code: public SyncGroupInner beginUpdate(String resourceGroupName, String serverName, String databaseName, String syncGroupName, SyncGroupInner parameters) {
          return beginUpdateWithServiceResponseAsync(resourceGroupName, serverName, databaseName, syncGroupName, parameters).toBlocking().single().body();
      }
docs: Updates a sync group.
  
  @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.
  @param parameters The requested sync group resource state.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the SyncGroupInner object if successful.