@Override
	public void actionPerformed(ListingActionContext context) {
		Function function = functionPlugin.getFunction(context);
		if (function != null) {
			showDialog(function);
		}
	}
An action to set the stack purge of the function at the current 
location. 


@since  Tracker Id 548
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/function/EditFunctionPurgeAction.java