original_docstring: Retrieves operation given its reference.
  
      Args:
        operation_ref: str, some id for operation.
  
      Returns:
        object which represents operation.
      
docstring: Retrieves operation given its reference.
docstring_tokens: Retrieves operation given its reference .
code: def Poll(self, operation_ref):
      """Retrieves operation given its reference.
  
      Args:
        operation_ref: str, some id for operation.
  
      Returns:
        object which represents operation.
      """
      return None
code_tokens: def Poll ( self , operation_ref ) : return None
short_docstring: Retrieves operation given its reference.
short_docstring_tokens: Retrieves operation given its reference .
comment: """Retrieves operation given its reference.
  
      Args:
        operation_ref: str, some id for operation.
  
      Returns:
        object which represents operation.
      """