docs: docs update (#911)

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Fixes #<issue_number_goes_here> 🦕
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+
+<h1><a href="bigqueryreservation_v1.html">BigQuery Reservation API</a> . <a href="bigqueryreservation_v1.projects.html">projects</a> . <a href="bigqueryreservation_v1.projects.locations.html">locations</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="bigqueryreservation_v1.projects.locations.capacityCommitments.html">capacityCommitments()</a></code>
+</p>
+<p class="firstline">Returns the capacityCommitments Resource.</p>
+
+<p class="toc_element">
+  <code><a href="bigqueryreservation_v1.projects.locations.reservations.html">reservations()</a></code>
+</p>
+<p class="firstline">Returns the reservations Resource.</p>
+
+<p class="toc_element">
+  <code><a href="#getBiReservation">getBiReservation(name, x__xgafv=None)</a></code></p>
+<p class="firstline">Retrieves a BI reservation.</p>
+<p class="toc_element">
+  <code><a href="#searchAssignments">searchAssignments(parent, pageToken=None, pageSize=None, query=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Looks up assignments for a specified resource for a particular region.</p>
+<p class="toc_element">
+  <code><a href="#searchAssignments_next">searchAssignments_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="#updateBiReservation">updateBiReservation(name, body=None, updateMask=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Updates a BI reservation.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="getBiReservation">getBiReservation(name, x__xgafv=None)</code>
+  <pre>Retrieves a BI reservation.
+
+Args:
+  name: string, Required. Name of the requested reservation, for example:
+`projects/{project_id}/locations/{location_id}/bireservation` (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Represents a BI Reservation.
+    &quot;size&quot;: &quot;A String&quot;, # Size of a reservation, in bytes.
+    &quot;updateTime&quot;: &quot;A String&quot;, # Output only. The last update timestamp of a reservation.
+    &quot;name&quot;: &quot;A String&quot;, # The resource name of the singleton BI reservation.
+        # Reservation names have the form
+        # `projects/{project_id}/locations/{location_id}/bireservation`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="searchAssignments">searchAssignments(parent, pageToken=None, pageSize=None, query=None, x__xgafv=None)</code>
+  <pre>Looks up assignments for a specified resource for a particular region.
+If the request is about a project:
+
+1. Assignments created on the project will be returned if they exist.
+2. Otherwise assignments created on the closest ancestor will be
+   returned.
+3. Assignments for different JobTypes will all be returned.
+
+The same logic applies if the request is about a folder.
+
+If the request is about an organization, then assignments created on the
+organization will be returned (organization doesn&#x27;t have ancestors).
+
+Comparing to ListAssignments, there are some behavior
+differences:
+
+1. permission on the assignee will be verified in this API.
+2. Hierarchy lookup (project-&gt;folder-&gt;organization) happens in this API.
+3. Parent here is `projects/*/locations/*`, instead of
+   `projects/*/locations/*reservations/*`.
+
+**Note** &quot;-&quot; cannot be used for projects
+nor locations.
+
+Args:
+  parent: string, Required. The resource name of the admin project(containing project and location),
+e.g.:
+  &quot;projects/myproject/locations/US&quot;. (required)
+  pageToken: string, The next_page_token value returned from a previous List request, if any.
+  pageSize: integer, The maximum number of items to return per page.
+  query: string, Please specify resource name as assignee in the query.
+
+Examples:
+
+* `assignee=projects/myproject`
+* `assignee=folders/123`
+* `assignee=organizations/456`
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # The response for ReservationService.SearchAssignments.
+    &quot;nextPageToken&quot;: &quot;A String&quot;, # Token to retrieve the next page of results, or empty if there are no
+        # more results in the list.
+    &quot;assignments&quot;: [ # List of assignments visible to the user.
+      { # A Assignment allows a project to submit jobs
+          # of a certain type using slots from the specified reservation.
+        &quot;jobType&quot;: &quot;A String&quot;, # Which type of jobs will use the reservation.
+        &quot;state&quot;: &quot;A String&quot;, # Output only. State of the assignment.
+        &quot;name&quot;: &quot;A String&quot;, # Output only. Name of the resource. E.g.:
+            # `projects/myproject/locations/US/reservations/team1-prod/assignments/123`.
+        &quot;assignee&quot;: &quot;A String&quot;, # The resource which will use the reservation. E.g.
+            # `projects/myproject`, `folders/123`, or `organizations/456`.
+      },
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="searchAssignments_next">searchAssignments_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call &#x27;execute()&#x27; on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+<div class="method">
+    <code class="details" id="updateBiReservation">updateBiReservation(name, body=None, updateMask=None, x__xgafv=None)</code>
+  <pre>Updates a BI reservation.
+
+Only fields specified in the `field_mask` are updated.
+
+A singleton BI reservation always exists with default size 0.
+In order to reserve BI capacity it needs to be updated to an amount
+greater than 0. In order to release BI capacity reservation size
+must be set to 0.
+
+Args:
+  name: string, The resource name of the singleton BI reservation.
+Reservation names have the form
+`projects/{project_id}/locations/{location_id}/bireservation`. (required)
+  body: object, The request body.
+    The object takes the form of:
+
+{ # Represents a BI Reservation.
+  &quot;size&quot;: &quot;A String&quot;, # Size of a reservation, in bytes.
+  &quot;updateTime&quot;: &quot;A String&quot;, # Output only. The last update timestamp of a reservation.
+  &quot;name&quot;: &quot;A String&quot;, # The resource name of the singleton BI reservation.
+      # Reservation names have the form
+      # `projects/{project_id}/locations/{location_id}/bireservation`.
+}
+
+  updateMask: string, A list of fields to be updated in this request.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Represents a BI Reservation.
+    &quot;size&quot;: &quot;A String&quot;, # Size of a reservation, in bytes.
+    &quot;updateTime&quot;: &quot;A String&quot;, # Output only. The last update timestamp of a reservation.
+    &quot;name&quot;: &quot;A String&quot;, # The resource name of the singleton BI reservation.
+        # Reservation names have the form
+        # `projects/{project_id}/locations/{location_id}/bireservation`.
+  }</pre>
+</div>
+
+</body></html>
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