chore: regens API reference docs (#889)

diff --git a/docs/dyn/analytics_v3.management.customMetrics.html b/docs/dyn/analytics_v3.management.customMetrics.html
index 8b23630..000bdc0 100644
--- a/docs/dyn/analytics_v3.management.customMetrics.html
+++ b/docs/dyn/analytics_v3.management.customMetrics.html
@@ -78,16 +78,16 @@
   <code><a href="#get">get(accountId, webPropertyId, customMetricId)</a></code></p>
 <p class="firstline">Get a custom metric to which the user has access.</p>
 <p class="toc_element">
-  <code><a href="#insert">insert(accountId, webPropertyId, body)</a></code></p>
+  <code><a href="#insert">insert(accountId, webPropertyId, body=None)</a></code></p>
 <p class="firstline">Create a new custom metric.</p>
 <p class="toc_element">
   <code><a href="#list">list(accountId, webPropertyId, max_results=None, start_index=None)</a></code></p>
 <p class="firstline">Lists custom metrics to which the user has access.</p>
 <p class="toc_element">
-  <code><a href="#patch">patch(accountId, webPropertyId, customMetricId, body, ignoreCustomDataSourceLinks=None)</a></code></p>
+  <code><a href="#patch">patch(accountId, webPropertyId, customMetricId, body=None, ignoreCustomDataSourceLinks=None)</a></code></p>
 <p class="firstline">Updates an existing custom metric. This method supports patch semantics.</p>
 <p class="toc_element">
-  <code><a href="#update">update(accountId, webPropertyId, customMetricId, body, ignoreCustomDataSourceLinks=None)</a></code></p>
+  <code><a href="#update">update(accountId, webPropertyId, customMetricId, body=None, ignoreCustomDataSourceLinks=None)</a></code></p>
 <p class="firstline">Updates an existing custom metric.</p>
 <h3>Method Details</h3>
 <div class="method">
@@ -104,12 +104,12 @@
 
     { # JSON template for Analytics Custom Metric.
       "index": 42, # Index of the custom metric.
-      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+      "updated": "A String", # Time the custom metric was last modified.
       "name": "A String", # Name of the custom metric.
       "created": "A String", # Time the custom metric was created.
       "max_value": "A String", # Max value of custom metric.
       "min_value": "A String", # Min value of custom metric.
-      "updated": "A String", # Time the custom metric was last modified.
+      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
       "webPropertyId": "A String", # Property ID.
       "active": True or False, # Boolean indicating whether the custom metric is active.
       "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.
@@ -125,23 +125,23 @@
 </div>
 
 <div class="method">
-    <code class="details" id="insert">insert(accountId, webPropertyId, body)</code>
+    <code class="details" id="insert">insert(accountId, webPropertyId, body=None)</code>
   <pre>Create a new custom metric.
 
 Args:
   accountId: string, Account ID for the custom metric to create. (required)
   webPropertyId: string, Web property ID for the custom dimension to create. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # JSON template for Analytics Custom Metric.
     "index": 42, # Index of the custom metric.
-    "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+    "updated": "A String", # Time the custom metric was last modified.
     "name": "A String", # Name of the custom metric.
     "created": "A String", # Time the custom metric was created.
     "max_value": "A String", # Max value of custom metric.
     "min_value": "A String", # Min value of custom metric.
-    "updated": "A String", # Time the custom metric was last modified.
+    "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
     "webPropertyId": "A String", # Property ID.
     "active": True or False, # Boolean indicating whether the custom metric is active.
     "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.
@@ -161,12 +161,12 @@
 
     { # JSON template for Analytics Custom Metric.
       "index": 42, # Index of the custom metric.
-      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+      "updated": "A String", # Time the custom metric was last modified.
       "name": "A String", # Name of the custom metric.
       "created": "A String", # Time the custom metric was created.
       "max_value": "A String", # Max value of custom metric.
       "min_value": "A String", # Min value of custom metric.
-      "updated": "A String", # Time the custom metric was last modified.
+      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
       "webPropertyId": "A String", # Property ID.
       "active": True or False, # Boolean indicating whether the custom metric is active.
       "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.
@@ -200,12 +200,12 @@
     "items": [ # Collection of custom metrics.
       { # JSON template for Analytics Custom Metric.
           "index": 42, # Index of the custom metric.
-          "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+          "updated": "A String", # Time the custom metric was last modified.
           "name": "A String", # Name of the custom metric.
           "created": "A String", # Time the custom metric was created.
           "max_value": "A String", # Max value of custom metric.
           "min_value": "A String", # Min value of custom metric.
-          "updated": "A String", # Time the custom metric was last modified.
+          "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
           "webPropertyId": "A String", # Property ID.
           "active": True or False, # Boolean indicating whether the custom metric is active.
           "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.
@@ -228,24 +228,24 @@
 </div>
 
 <div class="method">
-    <code class="details" id="patch">patch(accountId, webPropertyId, customMetricId, body, ignoreCustomDataSourceLinks=None)</code>
+    <code class="details" id="patch">patch(accountId, webPropertyId, customMetricId, body=None, ignoreCustomDataSourceLinks=None)</code>
   <pre>Updates an existing custom metric. This method supports patch semantics.
 
 Args:
   accountId: string, Account ID for the custom metric to update. (required)
   webPropertyId: string, Web property ID for the custom metric to update. (required)
   customMetricId: string, Custom metric ID for the custom metric to update. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # JSON template for Analytics Custom Metric.
     "index": 42, # Index of the custom metric.
-    "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+    "updated": "A String", # Time the custom metric was last modified.
     "name": "A String", # Name of the custom metric.
     "created": "A String", # Time the custom metric was created.
     "max_value": "A String", # Max value of custom metric.
     "min_value": "A String", # Min value of custom metric.
-    "updated": "A String", # Time the custom metric was last modified.
+    "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
     "webPropertyId": "A String", # Property ID.
     "active": True or False, # Boolean indicating whether the custom metric is active.
     "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.
@@ -266,12 +266,12 @@
 
     { # JSON template for Analytics Custom Metric.
       "index": 42, # Index of the custom metric.
-      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+      "updated": "A String", # Time the custom metric was last modified.
       "name": "A String", # Name of the custom metric.
       "created": "A String", # Time the custom metric was created.
       "max_value": "A String", # Max value of custom metric.
       "min_value": "A String", # Min value of custom metric.
-      "updated": "A String", # Time the custom metric was last modified.
+      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
       "webPropertyId": "A String", # Property ID.
       "active": True or False, # Boolean indicating whether the custom metric is active.
       "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.
@@ -287,24 +287,24 @@
 </div>
 
 <div class="method">
-    <code class="details" id="update">update(accountId, webPropertyId, customMetricId, body, ignoreCustomDataSourceLinks=None)</code>
+    <code class="details" id="update">update(accountId, webPropertyId, customMetricId, body=None, ignoreCustomDataSourceLinks=None)</code>
   <pre>Updates an existing custom metric.
 
 Args:
   accountId: string, Account ID for the custom metric to update. (required)
   webPropertyId: string, Web property ID for the custom metric to update. (required)
   customMetricId: string, Custom metric ID for the custom metric to update. (required)
-  body: object, The request body. (required)
+  body: object, The request body.
     The object takes the form of:
 
 { # JSON template for Analytics Custom Metric.
     "index": 42, # Index of the custom metric.
-    "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+    "updated": "A String", # Time the custom metric was last modified.
     "name": "A String", # Name of the custom metric.
     "created": "A String", # Time the custom metric was created.
     "max_value": "A String", # Max value of custom metric.
     "min_value": "A String", # Min value of custom metric.
-    "updated": "A String", # Time the custom metric was last modified.
+    "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
     "webPropertyId": "A String", # Property ID.
     "active": True or False, # Boolean indicating whether the custom metric is active.
     "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.
@@ -325,12 +325,12 @@
 
     { # JSON template for Analytics Custom Metric.
       "index": 42, # Index of the custom metric.
-      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
+      "updated": "A String", # Time the custom metric was last modified.
       "name": "A String", # Name of the custom metric.
       "created": "A String", # Time the custom metric was created.
       "max_value": "A String", # Max value of custom metric.
       "min_value": "A String", # Min value of custom metric.
-      "updated": "A String", # Time the custom metric was last modified.
+      "kind": "analytics#customMetric", # Kind value for a custom metric. Set to "analytics#customMetric". It is a read-only field.
       "webPropertyId": "A String", # Property ID.
       "active": True or False, # Boolean indicating whether the custom metric is active.
       "scope": "A String", # Scope of the custom metric: HIT or PRODUCT.