public Object getTransientState() {
		return null;
	}
Returns an object containing the plugins state.  Plugins should override this method if
they have state that they want to maintain between domain object state transitions (i.e. when the
user tabs to a different domain object and back) Whatever object is returned will be fed back to
the plugin after the tool state is switch back to the domain object that was active when the this
method was called.
@return Object to be return in the restoreTransientState() method.
Ghidra/Framework/Project/src/main/java/ghidra/framework/plugintool/Plugin.java