code: public final ListDatabasesPagedResponse listDatabases(InstanceName parent) {
      ListDatabasesRequest request =
          ListDatabasesRequest.newBuilder()
              .setParent(parent == null ? null : parent.toString())
              .build();
      return listDatabases(request);
    }
docs: Lists Cloud Spanner databases.
  
  <p>Sample code:
  
  <pre><code>
  try (DatabaseAdminClient databaseAdminClient = DatabaseAdminClient.create()) {
  InstanceName parent = InstanceName.of("[PROJECT]", "[INSTANCE]");
  for (Database element : databaseAdminClient.listDatabases(parent).iterateAll()) {
  // doThingsWith(element);
  }
  }
  </code></pre>
  
  @param parent Required. The instance whose databases should be listed. Values are of the form
  `projects/&lt;project&gt;/instances/&lt;instance&gt;`.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails