LabVIEW Shortcut Menu Plug-Ins
This plugin allows to insert node into existing wire or wires. Works similarly to one of the quick drop shortcuts, but it has some more features.
Some key functionalities:
- Inline node into single or multiple wire with a node alignment selection.
- It can handle dynamic dispatch and polymorphic terminals
- It can inline not only subVIs but anything what inherits from Node class, e.g. structures
The plugin is little buggy (e.g. in some cases it brakes undo sequence) and does not behave always perfectly (e.g. on branched wires), but with a bit of experience and knowledge where not to use it, I find if very useful. Hopefully someone will take this idea and create something more robust.
Looks interesting.
'Inline' doesn't work for me though. That has other meanings already.
Something like "insert into wire" or "wire though" or something maybe?
Search LabVIEW like a graph! 
I'm finding that I'd like the created wires to be cleaned up after the insert. I modified my copy of the plugin to do that:
P.S. - None of the Close Reference functions in your code are needed. You never need to close references that inherit from GObject.
Another area for improvement (sorry I don't have time to do it myself right now) would be to always do the insert if the node only has a single input and a single output, regardless of whether the types match. That would support situations like this, where my node has a void terminal, but the insert would still be fine (since the insert would define the type of the void terminal):
