`tdropdownwidgetcontroller`
	ro	dropdownwidget
pl		bounds_cx
pl		bounds_cy
pl		ondropdown

`tdropdowncontroller`
pl	ro	options

`tcustomdropdowncontroller`
	ro	dropdownwidget
		options
pl		color
pl		colorclient
pl		frametemplate
pl		facetemplate

`teventpersistent`

`tlinkedpersistent`

`tnullinterfacedpersistent`

`tvirtualpersistent`