code: func NewOptionsSelectBlockElement(optType string, placeholder *TextBlockObject, actionID string, options ...*OptionBlockObject) *SelectBlockElement {
  	return &SelectBlockElement{
  		Type:        optType,
  		Placeholder: placeholder,
  		ActionID:    actionID,
  		Options:     options,
  	}
  }
docs: // NewOptionsSelectBlockElement returns a new instance of SelectBlockElement for use with
  // the Options object only.