@Override
	protected boolean isEnabledForContext(ListingActionContext context) {
		if (context.hasSelection() || context.getAddress() == null) {
			return false;
		}
		ProgramLocation location = context.getLocation();
		return (location instanceof FunctionLocation);
	}
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