chore: regens API reference docs (#889)

diff --git a/docs/dyn/iam_v1.projects.roles.html b/docs/dyn/iam_v1.projects.roles.html
index ed643e0..fc43338 100644
--- a/docs/dyn/iam_v1.projects.roles.html
+++ b/docs/dyn/iam_v1.projects.roles.html
@@ -75,7 +75,7 @@
 <h1><a href="iam_v1.html">Identity and Access Management (IAM) API</a> . <a href="iam_v1.projects.html">projects</a> . <a href="iam_v1.projects.roles.html">roles</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
-  <code><a href="#create">create(parent, body, x__xgafv=None)</a></code></p>
+  <code><a href="#create">create(parent, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Creates a new Role.</p>
 <p class="toc_element">
   <code><a href="#delete">delete(name, etag=None, x__xgafv=None)</a></code></p>
@@ -90,28 +90,45 @@
   <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
 <p class="firstline">Retrieves the next page of results.</p>
 <p class="toc_element">
-  <code><a href="#patch">patch(name, body, updateMask=None, x__xgafv=None)</a></code></p>
+  <code><a href="#patch">patch(name, body=None, updateMask=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Updates a Role definition.</p>
 <p class="toc_element">
-  <code><a href="#undelete">undelete(name, body, x__xgafv=None)</a></code></p>
+  <code><a href="#undelete">undelete(name, body=None, x__xgafv=None)</a></code></p>
 <p class="firstline">Undelete a Role, bringing it back in its previous state.</p>
 <h3>Method Details</h3>
 <div class="method">
-    <code class="details" id="create">create(parent, body, x__xgafv=None)</code>
+    <code class="details" id="create">create(parent, body=None, x__xgafv=None)</code>
   <pre>Creates a new Role.
 
 Args:
-  parent: string, The resource name of the parent resource in one of the following formats:
-`organizations/{ORGANIZATION_ID}`
-`projects/{PROJECT_ID}` (required)
-  body: object, The request body. (required)
+  parent: string, The `parent` parameter's value depends on the target resource for the
+request, namely
+[`projects`](/iam/reference/rest/v1/projects.roles) or
+[`organizations`](/iam/reference/rest/v1/organizations.roles). Each
+resource type's `parent` value format is described below:
+
+* [`projects.roles.create()`](/iam/reference/rest/v1/projects.roles/create):
+  `projects/{PROJECT_ID}`. This method creates project-level
+  [custom roles](/iam/docs/understanding-custom-roles).
+  Example request URL:
+  `https://iam.googleapis.com/v1/projects/{PROJECT_ID}/roles`
+
+* [`organizations.roles.create()`](/iam/reference/rest/v1/organizations.roles/create):
+  `organizations/{ORGANIZATION_ID}`. This method creates organization-level
+  [custom roles](/iam/docs/understanding-custom-roles). Example request
+  URL:
+  `https://iam.googleapis.com/v1/organizations/{ORGANIZATION_ID}/roles`
+
+Note: Wildcard (*) values are invalid; you must specify a complete project
+ID or organization ID. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # The request to create a new role.
-    "roleId": "A String", # The role id to use for this role.
+    "roleId": "A String", # The role ID to use for this role.
     "role": { # A role in the Identity and Access Management API. # The Role resource to create.
-      "description": "A String", # Optional.  A human-readable description for the role.
-      "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+      "description": "A String", # Optional. A human-readable description for the role.
+      "title": "A String", # Optional. A human-readable title for the role.  Typically this
           # is limited to 100 UTF-8 bytes.
       "deleted": True or False, # The current deleted state of the role. This field is read only.
           # It will be ignored in calls to CreateRole and UpdateRole.
@@ -127,7 +144,7 @@
           # When Role is used in CreateRole, the role name must not be set.
           #
           # When Role is used in output and other input such as UpdateRole, the role
-          # name is the complete path, e.g., roles/logging.viewer for curated roles
+          # name is the complete path, e.g., roles/logging.viewer for predefined roles
           # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
     },
   }
@@ -141,8 +158,8 @@
   An object of the form:
 
     { # A role in the Identity and Access Management API.
-    "description": "A String", # Optional.  A human-readable description for the role.
-    "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+    "description": "A String", # Optional. A human-readable description for the role.
+    "title": "A String", # Optional. A human-readable title for the role.  Typically this
         # is limited to 100 UTF-8 bytes.
     "deleted": True or False, # The current deleted state of the role. This field is read only.
         # It will be ignored in calls to CreateRole and UpdateRole.
@@ -158,7 +175,7 @@
         # When Role is used in CreateRole, the role name must not be set.
         #
         # When Role is used in output and other input such as UpdateRole, the role
-        # name is the complete path, e.g., roles/logging.viewer for curated roles
+        # name is the complete path, e.g., roles/logging.viewer for predefined roles
         # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
   }</pre>
 </div>
@@ -174,9 +191,26 @@
 with the role are removed.
 
 Args:
-  name: string, The resource name of the role in one of the following formats:
-`organizations/{ORGANIZATION_ID}/roles/{ROLE_NAME}`
-`projects/{PROJECT_ID}/roles/{ROLE_NAME}` (required)
+  name: string, The `name` parameter's value depends on the target resource for the
+request, namely
+[`projects`](/iam/reference/rest/v1/projects.roles) or
+[`organizations`](/iam/reference/rest/v1/organizations.roles). Each
+resource type's `name` value format is described below:
+
+* [`projects.roles.delete()`](/iam/reference/rest/v1/projects.roles/delete):
+  `projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`. This method deletes only
+  [custom roles](/iam/docs/understanding-custom-roles) that have been
+  created at the project level. Example request URL:
+  `https://iam.googleapis.com/v1/projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`
+
+* [`organizations.roles.delete()`](/iam/reference/rest/v1/organizations.roles/delete):
+  `organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`. This method
+  deletes only [custom roles](/iam/docs/understanding-custom-roles) that
+  have been created at the organization level. Example request URL:
+  `https://iam.googleapis.com/v1/organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`
+
+Note: Wildcard (*) values are invalid; you must specify a complete project
+ID or organization ID. (required)
   etag: string, Used to perform a consistent read-modify-write.
   x__xgafv: string, V1 error format.
     Allowed values
@@ -187,8 +221,8 @@
   An object of the form:
 
     { # A role in the Identity and Access Management API.
-    "description": "A String", # Optional.  A human-readable description for the role.
-    "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+    "description": "A String", # Optional. A human-readable description for the role.
+    "title": "A String", # Optional. A human-readable title for the role.  Typically this
         # is limited to 100 UTF-8 bytes.
     "deleted": True or False, # The current deleted state of the role. This field is read only.
         # It will be ignored in calls to CreateRole and UpdateRole.
@@ -204,7 +238,7 @@
         # When Role is used in CreateRole, the role name must not be set.
         #
         # When Role is used in output and other input such as UpdateRole, the role
-        # name is the complete path, e.g., roles/logging.viewer for curated roles
+        # name is the complete path, e.g., roles/logging.viewer for predefined roles
         # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
   }</pre>
 </div>
@@ -214,10 +248,33 @@
   <pre>Gets a Role definition.
 
 Args:
-  name: string, The resource name of the role in one of the following formats:
-`roles/{ROLE_NAME}`
-`organizations/{ORGANIZATION_ID}/roles/{ROLE_NAME}`
-`projects/{PROJECT_ID}/roles/{ROLE_NAME}` (required)
+  name: string, The `name` parameter's value depends on the target resource for the
+request, namely
+[`roles`](/iam/reference/rest/v1/roles),
+[`projects`](/iam/reference/rest/v1/projects.roles), or
+[`organizations`](/iam/reference/rest/v1/organizations.roles). Each
+resource type's `name` value format is described below:
+
+* [`roles.get()`](/iam/reference/rest/v1/roles/get): `roles/{ROLE_NAME}`.
+  This method returns results from all
+  [predefined roles](/iam/docs/understanding-roles#predefined_roles) in
+  Cloud IAM. Example request URL:
+  `https://iam.googleapis.com/v1/roles/{ROLE_NAME}`
+
+* [`projects.roles.get()`](/iam/reference/rest/v1/projects.roles/get):
+  `projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`. This method returns only
+  [custom roles](/iam/docs/understanding-custom-roles) that have been
+  created at the project level. Example request URL:
+  `https://iam.googleapis.com/v1/projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`
+
+* [`organizations.roles.get()`](/iam/reference/rest/v1/organizations.roles/get):
+  `organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`. This method
+  returns only [custom roles](/iam/docs/understanding-custom-roles) that
+  have been created at the organization level. Example request URL:
+  `https://iam.googleapis.com/v1/organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`
+
+Note: Wildcard (*) values are invalid; you must specify a complete project
+ID or organization ID. (required)
   x__xgafv: string, V1 error format.
     Allowed values
       1 - v1 error format
@@ -227,8 +284,8 @@
   An object of the form:
 
     { # A role in the Identity and Access Management API.
-    "description": "A String", # Optional.  A human-readable description for the role.
-    "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+    "description": "A String", # Optional. A human-readable description for the role.
+    "title": "A String", # Optional. A human-readable title for the role.  Typically this
         # is limited to 100 UTF-8 bytes.
     "deleted": True or False, # The current deleted state of the role. This field is read only.
         # It will be ignored in calls to CreateRole and UpdateRole.
@@ -244,7 +301,7 @@
         # When Role is used in CreateRole, the role name must not be set.
         #
         # When Role is used in output and other input such as UpdateRole, the role
-        # name is the complete path, e.g., roles/logging.viewer for curated roles
+        # name is the complete path, e.g., roles/logging.viewer for predefined roles
         # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
   }</pre>
 </div>
@@ -254,10 +311,33 @@
   <pre>Lists the Roles defined on a resource.
 
 Args:
-  parent: string, The resource name of the parent resource in one of the following formats:
-`` (empty string) -- this refers to curated roles.
-`organizations/{ORGANIZATION_ID}`
-`projects/{PROJECT_ID}` (required)
+  parent: string, The `parent` parameter's value depends on the target resource for the
+request, namely
+[`roles`](/iam/reference/rest/v1/roles),
+[`projects`](/iam/reference/rest/v1/projects.roles), or
+[`organizations`](/iam/reference/rest/v1/organizations.roles). Each
+resource type's `parent` value format is described below:
+
+* [`roles.list()`](/iam/reference/rest/v1/roles/list): An empty string.
+  This method doesn't require a resource; it simply returns all
+  [predefined roles](/iam/docs/understanding-roles#predefined_roles) in
+  Cloud IAM. Example request URL:
+  `https://iam.googleapis.com/v1/roles`
+
+* [`projects.roles.list()`](/iam/reference/rest/v1/projects.roles/list):
+  `projects/{PROJECT_ID}`. This method lists all project-level
+  [custom roles](/iam/docs/understanding-custom-roles).
+  Example request URL:
+  `https://iam.googleapis.com/v1/projects/{PROJECT_ID}/roles`
+
+* [`organizations.roles.list()`](/iam/reference/rest/v1/organizations.roles/list):
+  `organizations/{ORGANIZATION_ID}`. This method lists all
+  organization-level [custom roles](/iam/docs/understanding-custom-roles).
+  Example request URL:
+  `https://iam.googleapis.com/v1/organizations/{ORGANIZATION_ID}/roles`
+
+Note: Wildcard (*) values are invalid; you must specify a complete project
+ID or organization ID. (required)
   pageSize: integer, Optional limit on the number of roles to include in the response.
   showDeleted: boolean, Include Roles that have been deleted.
   pageToken: string, Optional pagination token returned in an earlier ListRolesResponse.
@@ -278,8 +358,8 @@
         # `ListRolesRequest.page_token` to this value.
     "roles": [ # The Roles defined on this resource.
       { # A role in the Identity and Access Management API.
-        "description": "A String", # Optional.  A human-readable description for the role.
-        "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+        "description": "A String", # Optional. A human-readable description for the role.
+        "title": "A String", # Optional. A human-readable title for the role.  Typically this
             # is limited to 100 UTF-8 bytes.
         "deleted": True or False, # The current deleted state of the role. This field is read only.
             # It will be ignored in calls to CreateRole and UpdateRole.
@@ -295,7 +375,7 @@
             # When Role is used in CreateRole, the role name must not be set.
             #
             # When Role is used in output and other input such as UpdateRole, the role
-            # name is the complete path, e.g., roles/logging.viewer for curated roles
+            # name is the complete path, e.g., roles/logging.viewer for predefined roles
             # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
       },
     ],
@@ -317,20 +397,36 @@
 </div>
 
 <div class="method">
-    <code class="details" id="patch">patch(name, body, updateMask=None, x__xgafv=None)</code>
+    <code class="details" id="patch">patch(name, body=None, updateMask=None, x__xgafv=None)</code>
   <pre>Updates a Role definition.
 
 Args:
-  name: string, The resource name of the role in one of the following formats:
-`roles/{ROLE_NAME}`
-`organizations/{ORGANIZATION_ID}/roles/{ROLE_NAME}`
-`projects/{PROJECT_ID}/roles/{ROLE_NAME}` (required)
-  body: object, The request body. (required)
+  name: string, The `name` parameter's value depends on the target resource for the
+request, namely
+[`projects`](/iam/reference/rest/v1/projects.roles) or
+[`organizations`](/iam/reference/rest/v1/organizations.roles). Each
+resource type's `name` value format is described below:
+
+* [`projects.roles.patch()`](/iam/reference/rest/v1/projects.roles/patch):
+  `projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`. This method updates only
+  [custom roles](/iam/docs/understanding-custom-roles) that have been
+  created at the project level. Example request URL:
+  `https://iam.googleapis.com/v1/projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`
+
+* [`organizations.roles.patch()`](/iam/reference/rest/v1/organizations.roles/patch):
+  `organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`. This method
+  updates only [custom roles](/iam/docs/understanding-custom-roles) that
+  have been created at the organization level. Example request URL:
+  `https://iam.googleapis.com/v1/organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`
+
+Note: Wildcard (*) values are invalid; you must specify a complete project
+ID or organization ID. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # A role in the Identity and Access Management API.
-  "description": "A String", # Optional.  A human-readable description for the role.
-  "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+  "description": "A String", # Optional. A human-readable description for the role.
+  "title": "A String", # Optional. A human-readable title for the role.  Typically this
       # is limited to 100 UTF-8 bytes.
   "deleted": True or False, # The current deleted state of the role. This field is read only.
       # It will be ignored in calls to CreateRole and UpdateRole.
@@ -346,7 +442,7 @@
       # When Role is used in CreateRole, the role name must not be set.
       # 
       # When Role is used in output and other input such as UpdateRole, the role
-      # name is the complete path, e.g., roles/logging.viewer for curated roles
+      # name is the complete path, e.g., roles/logging.viewer for predefined roles
       # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
 }
 
@@ -360,8 +456,8 @@
   An object of the form:
 
     { # A role in the Identity and Access Management API.
-    "description": "A String", # Optional.  A human-readable description for the role.
-    "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+    "description": "A String", # Optional. A human-readable description for the role.
+    "title": "A String", # Optional. A human-readable title for the role.  Typically this
         # is limited to 100 UTF-8 bytes.
     "deleted": True or False, # The current deleted state of the role. This field is read only.
         # It will be ignored in calls to CreateRole and UpdateRole.
@@ -377,20 +473,37 @@
         # When Role is used in CreateRole, the role name must not be set.
         #
         # When Role is used in output and other input such as UpdateRole, the role
-        # name is the complete path, e.g., roles/logging.viewer for curated roles
+        # name is the complete path, e.g., roles/logging.viewer for predefined roles
         # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
   }</pre>
 </div>
 
 <div class="method">
-    <code class="details" id="undelete">undelete(name, body, x__xgafv=None)</code>
+    <code class="details" id="undelete">undelete(name, body=None, x__xgafv=None)</code>
   <pre>Undelete a Role, bringing it back in its previous state.
 
 Args:
-  name: string, The resource name of the role in one of the following formats:
-`organizations/{ORGANIZATION_ID}/roles/{ROLE_NAME}`
-`projects/{PROJECT_ID}/roles/{ROLE_NAME}` (required)
-  body: object, The request body. (required)
+  name: string, The `name` parameter's value depends on the target resource for the
+request, namely
+[`projects`](/iam/reference/rest/v1/projects.roles) or
+[`organizations`](/iam/reference/rest/v1/organizations.roles). Each
+resource type's `name` value format is described below:
+
+* [`projects.roles.undelete()`](/iam/reference/rest/v1/projects.roles/undelete):
+  `projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`. This method undeletes
+  only [custom roles](/iam/docs/understanding-custom-roles) that have been
+  created at the project level. Example request URL:
+  `https://iam.googleapis.com/v1/projects/{PROJECT_ID}/roles/{CUSTOM_ROLE_ID}`
+
+* [`organizations.roles.undelete()`](/iam/reference/rest/v1/organizations.roles/undelete):
+  `organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`. This method
+  undeletes only [custom roles](/iam/docs/understanding-custom-roles) that
+  have been created at the organization level. Example request URL:
+  `https://iam.googleapis.com/v1/organizations/{ORGANIZATION_ID}/roles/{CUSTOM_ROLE_ID}`
+
+Note: Wildcard (*) values are invalid; you must specify a complete project
+ID or organization ID. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # The request to undelete an existing role.
@@ -406,8 +519,8 @@
   An object of the form:
 
     { # A role in the Identity and Access Management API.
-    "description": "A String", # Optional.  A human-readable description for the role.
-    "title": "A String", # Optional.  A human-readable title for the role.  Typically this
+    "description": "A String", # Optional. A human-readable description for the role.
+    "title": "A String", # Optional. A human-readable title for the role.  Typically this
         # is limited to 100 UTF-8 bytes.
     "deleted": True or False, # The current deleted state of the role. This field is read only.
         # It will be ignored in calls to CreateRole and UpdateRole.
@@ -423,7 +536,7 @@
         # When Role is used in CreateRole, the role name must not be set.
         #
         # When Role is used in output and other input such as UpdateRole, the role
-        # name is the complete path, e.g., roles/logging.viewer for curated roles
+        # name is the complete path, e.g., roles/logging.viewer for predefined roles
         # and organizations/{ORGANIZATION_ID}/roles/logging.viewer for custom roles.
   }</pre>
 </div>