MaestroPreviously known as Transact Maestro. | Form Builder | 5.1 & Higher This feature is related to 5.1 and higher.
The screenshot below shows the 'item' parameter expanded in the developer tools console. It contains among other information, tree structure information in $$parent, item properties in the 'properties' property, style information in the 'styles' property, getData/setData getter and setter methods for the data value, and rule code in the 'rules' array. Note that this example has only a change rule with code 'debugger;' which simply triggers the debugger on a change event.
Next, learn about business rule info object.