code: func (g *GraphDefinitionMarker) GetValOk() (json.Number, bool) {
  	if g == nil || g.Val == nil {
  		return "", false
  	}
  	return *g.Val, true
  }
docs: // GetValOk returns a tuple with the Val field if it's non-nil, zero value otherwise
  // and a boolean to check if the value has been set.