parameters: (self, op)
docstring: Add a new control input to this operation.
  
      Args:
        op: the Operation to add as control input.
  
      Raises:
        TypeError: if op is not an Operation.
        ValueError: if op is from a different graph.
docstring_summary: Add a new control input to this operation.
docstring_tokens: Add a new control input to this operation .
function: def _add_control_input(self, op):
      """Add a new control input to this operation.
  
      Args:
        op: the Operation to add as control input.
  
      Raises:
        TypeError: if op is not an Operation.
        ValueError: if op is from a different graph.
      """
      self._add_control_inputs([op])
function_tokens: def _add_control_input ( self , op ) : self . _add_control_inputs ( [ op ] )