code: def get_doc_sources(api_name):
      """Get a map from module to a DocSource object.
  
      Args:
        api_name: API you want to generate (e.g. `tensorflow` or `estimator`).
  
      Returns:
        Map from module name to DocSource object.
      """
      if api_name == tf_export.TENSORFLOW_API_NAME:
          return _TENSORFLOW_DOC_SOURCES
      if api_name == tf_export.ESTIMATOR_API_NAME:
          return _ESTIMATOR_DOC_SOURCES
      if api_name == tf_export.KERAS_API_NAME:
          return _KERAS_DOC_SOURCES
      return {}
  
imports: from tensorflow.python.util import tf_export
label_desc: Use image node_id 1 for calling a global function with example usage: get_doc_sources(api_name) and returns: dict, _TENSORFLOW_DOC_SOURCES, _ESTIMATOR_DOC_SOURCES, _KERAS_DOC_SOURCES