code: func (t *TraceServiceDefinition) GetDisplayFormatOk() (string, bool) {
  	if t == nil || t.DisplayFormat == nil {
  		return "", false
  	}
  	return *t.DisplayFormat, true
  }
docs: // GetDisplayFormatOk returns a tuple with the DisplayFormat field if it's non-nil, zero value otherwise
  // and a boolean to check if the value has been set.