code: function(regexp, fn, options) {
  			if (_.isString(regexp))
  				regexp = new RegExp(regexp);
  			
  			generators.add(function(node, syntax) {
  				var m;
  				if ((m = regexp.exec(node.name()))) {
  					return fn(m, node, syntax);
  				}
  				
  				return null;
  			}, options);
  		}
docs: Add generator. A generator function <code>fn</code> will be called
  only if current abbreviation matches <code>regexp</code> regular
  expression and this function should return <code>null</code> if
  abbreviation cannot be resolved
  @param {RegExp} regexp Regular expression for abbreviation element name
  @param {Function} fn Resolver function
  @param {Object} options Options list as described in
  {@link HandlerList#add()} method