code: function(input) {
  			var self = this;
  			if (!self.settings.create) return false;
  			var filter = self.settings.createFilter;
  			return input.length
  				&& (typeof filter !== 'function' || filter.apply(self, [input]))
  				&& (typeof filter !== 'string' || new RegExp(filter).test(input))
  				&& (!(filter instanceof RegExp) || filter.test(input));
  		}
docs: Determines whether or not to display the
  create item prompt, given a user input.
  
  @param {string} input
  @return {boolean}