[Hack] jQuery2 method: trigger event handlers but the ones with given namespace

jquery.triggerBut.demo.js

(function( $ ) {
	var d = $(document),
	    log = function (event) { d.on(event, function(e) { console.log(event, e.type, e.namespace, e.namespace_re) }) }

	log("test")
	log("test.a")
	log("test.b")
	log("test.b.a")
	log("test.c")

	d.triggerBut("test", "b")
	d.triggerBut("test.a", "b")
})(jQuery);

jquery.triggerBut.js

(function( $ ) {
	$.fn.triggerBut = function( event, namespace, data ) {
		// make sure event is a jQuery event
		if ( !event[ $.expando ] ) {
			event = new $.Event(
				Object.prototype.hasOwnProperty.call( event, "type" ) ? event.type : event,
				typeof event === "object" && event
			)
		}
		// substitute event.isPropagationStopped on first iteration only to replace namespace regex
		var isPropagationStopped = event.isPropagationStopped // backup original isPropagationStopped
		event.isPropagationStopped = function() {
			if ( !event.namespace_but ) {
				event.namespace_but = new RegExp( // inject modified namespace regex only once
					"^(?!(.*\\.|)" + namespace + "(\\.|$))" +
					(event.namespace_re ? event.namespace_re.source.replace("(^|\\.)", "(.*\\.|)") : "")
				)
			}
			event.namespace_re = event.namespace_but // replace original regex with modified namespace regex
			event.isPropagationStopped = isPropagationStopped // restore original isPropagationStopped
			return isPropagationStopped() // call original isPropagationStopped
		}
		return $.fn.trigger.call(this, event, data) // call trigger with modified event
	}
})(jQuery);

Works with jQuery 2.1.1, but depends on how "event.namespace_re" is named and crafted....