code: function(selector) {
  
  	var allMatches = localnwt.all(selector),
  		testNode = this._node,
  		ancestor = null,
  		maxDepth = 0;
  
  	if( allMatches.size() == 0 ) {
  		return null;
  	}
  
  	while( true ) {
  
  		// Iterate through all matches for each parent, and exit as soon as we have a match
  		// Pretty bad performance, but super small. TODO: Omtimize
  		allMatches.each(function (el) {
  			if (el._node == testNode) {
  				ancestor = el;
  			}
  		});
  
  		var parentNode = testNode.parentNode;
  
  		if( ancestor || !parentNode) { break; }
  		testNode = parentNode;
  	}
  
  	if( ancestor ) {
  		return ancestor;
  	} else {
  		return null;
  	}
  }
docs: Returns the ancestor that matches the css selector
  @param string CSS Selector