code: def check_output_variable(self, variable):
          
          match = False
          if variable in self.out_variables:
              match = True
          return match
docs: Check to see if output variable was requested by downstream app.
  
          Using the auto generated dictionary of output variables check to see if provided
          variable was requested by downstream app.
  
          Args:
              variable (string): The variable name, not the full variable.
  
          Returns:
              (boolean): Boolean value indicator whether a match was found.