code: public Observable<Page<SyncFullSchemaPropertiesInner>> listHubSchemasAsync(final String resourceGroupName, final String serverName, final String databaseName, final String syncGroupName) {
          return listHubSchemasWithServiceResponseAsync(resourceGroupName, serverName, databaseName, syncGroupName)
              .map(new Func1<ServiceResponse<Page<SyncFullSchemaPropertiesInner>>, Page<SyncFullSchemaPropertiesInner>>() {
                  @Override
                  public Page<SyncFullSchemaPropertiesInner> call(ServiceResponse<Page<SyncFullSchemaPropertiesInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets a collection of hub database schemas.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param serverName The name of the server.
  @param databaseName The name of the database on which the sync group is hosted.
  @param syncGroupName The name of the sync group.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;SyncFullSchemaPropertiesInner&gt; object