@Override
	public void processEvent(PluginEvent event) {
		if (event instanceof ProgramActivatedPluginEvent) {
			Program activeProgram = ((ProgramActivatedPluginEvent) event).getActiveProgram();
			currentDomainObject = activeProgram;
		}
	}
Constructor for plugin that handles multi-user merge of programs.

@param tool the tool with the active program to be merged
@param mergeManager the merge manager that will control the merge process
@param program the current program
Ghidra/Features/Base/src/main/java/ghidra/app/merge/ProgramMergeManagerPlugin.java