code: function(element, options) {
          element = this.setElement(element);
          options = this.setOptions(options, element);
  
          // Add class and set relative positioning
          if (!element.is('body')) {
              element.addClass('is-maskable');
  
              var position = element.css('position');
  
              if (!position || position === 'static') {
                  element.css('position', 'relative');
              }
          }
  
          // Find a mask or create it
          var mask = element.find('> ' + this.ns());
  
          if (!mask.length) {
              mask = this.render(options.template);
          }
  
          this.setMask(mask);
  
          if (options.selector) {
              this.addEvent('click', 'document', 'toggle', options.selector);
          }
  
          this.initialize();
      }
docs: Initialize the mask.
  
  @param {jQuery} element
  @param {Object} [options]