code: function(element, method) {
  			if (!$.metadata)
  				return;
  			
  			var meta = this.settings.meta
  				? $(element).metadata()[this.settings.meta]
  				: $(element).metadata();
  			
  			return meta && meta.messages && meta.messages[method];
  		}
docs: return the custom message for the given element and validation method specified in the element's "messages" metadata