code: def set_grb_start_end(cp, start, end):
      
      cp.set("workflow", "start-time", str(start))
      cp.set("workflow", "end-time", str(end))
  
      return cp
docs: Function to update analysis boundaries as workflow is generated
  
      Parameters
      ----------
      cp : pycbc.workflow.configuration.WorkflowConfigParser object
      The parsed configuration options of a pycbc.workflow.core.Workflow.
  
      start : int
      The start of the workflow analysis time.
  
      end : int
      The end of the workflow analysis time.
  
      Returns
      --------
      cp : pycbc.workflow.configuration.WorkflowConfigParser object
      The modified WorkflowConfigParser object.