A Gui class for ProxyChain. For more example uses, see ProxyChain.
create a gui for the proxyChain given, with space for <numItems> parameters; parents and bounds for gui placement, makeSkip flag; and options to create extra buttons on left side.
make a new ProxyCHainGui.
the proxychain
the CompositeView where the buttons live
the NdefGui built into the view
all left-hand buttons for turning nodes on and off
all left-hand buttons which turn nodes on and off