code: func (i *ImageDefinition) GetMarginOk() (string, bool) {
  	if i == nil || i.Margin == nil {
  		return "", false
  	}
  	return *i.Margin, true
  }
docs: // GetMarginOk returns a tuple with the Margin field if it's non-nil, zero value otherwise
  // and a boolean to check if the value has been set.