code: func (step *CallFlowPauseStep) MarshalJSON() ([]byte, error) {
  	data := jsonCallFlowPauseStep{}
  	data.CallFlowStepBase = step.CallFlowStepBase
  	data.Action = "pause"
  	data.Options.Length = int(step.Length / time.Second)
  	return json.Marshal(data)
  }
docs: // MarshalJSON implements the json.Marshaler interface.