@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		Version version = FrameworkUtil.getBundle(getClass()).getVersion();
		StringBuilder message = new StringBuilder();
		message.append("GhidraDev " + version.toString() + "\n\n");
		message.append("Ghidra Development support for Eclipse");
		EclipseMessageUtils.showInfoDialog("About", message.toString());
		return null;
	}
Pops up a dialog with information about the plugin.
GhidraBuild/EclipsePlugins/GhidraDev/GhidraDevPlugin/src/main/java/ghidradev/ghidraprojectcreator/commands/AboutCommand.java