Make the naming of helper methods in the CombinedContentsManager consistent with the corresponding helper methods in the CombinedCheckpointsManager
Make the naming of helper methods in the CombinedContentsManager consistent with the corresponding helper methods in the CombinedCheckpointsManager

GoogleCloudPlatform/jupyter-extensions,GoogleCloudPlatform/jupyter-extensions,GoogleCloudPlatform/jupyter-extensions,GoogleCloudPlatform/jupyter-extensions