public Class<?> getContextType() {
		return contextType;
	}
A signal used when installing actions.  Some actions are only added to a given window
if there is a provider in that window that can work with that action.  Providers can return
a context class from this method to control whether dependent actions get added.  Most
providers return null for this method, which means they will not have any dependent
actions added to windows other than the primary application window.

@return a class representing the desired context type or null;
Ghidra/Framework/Docking/src/main/java/docking/ComponentProvider.java