func RegisterReviewCommentEventHandler(name string, fn ReviewCommentEventHandler, help HelpProvider) {
	pluginHelp[name] = help
	reviewCommentEventHandlers[name] = fn
}
func RegisterReviewCommentEventHandler(name string, fn ReviewCommentEventHandler, help HelpProvider) {
	pluginHelp[name] = help
	reviewCommentEventHandlers[name] = fn
}
// RegisterReviewCommentEventHandler registers a plugin's github.ReviewCommentEvent handler.