This feature is new in Q 4.8.
Represents a label on a form. You cannot do anything with it other than include it in a call to the RuleForm object's setInputControls() or setOutputControls() functions.
Use this to control whether the item should be treated as an expression or as a string in R code. Only applicable to textBox, comboBox and dropBox controls.
Use this where your Rule has many controls, and they do not fit comfortably in a single line. It allows you to specify that a new row will be started after this control.
c.lineBreakAfter = true;
Returns the name we use to refer to this class in the documentation.
Set this to false if you want a control you have created to not be shown to the user. This property is only available in Q v5.4