@Override
	protected void init() {
		historyService = tool.getService(NavigationHistoryService.class);
		codeUnitFormatter = new BrowserCodeUnitFormat(tool);
	}
Creates a new instance of the plugin

@param tool the tool
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/navigation/NextPrevAddressPlugin.java