code: function( value, allowed_values ) {
  			var error;
  
  			// Convert the allowed_values to an array:
  			allowed_values = allowed_values.split( ',' );
  
  			if ( allowed_values.indexOf( value ) === -1 ) {
  				error = {
  					"rule": "matches",
  					"message": "ERROR:provided value does not match an allowed value: " + allowed_values
  				};
  				return [ error ];
  			}
  			return;
  		}
docs: end METHOD hasProperties()