code: function( wrapper, item, klass, attribute ) {
  
          // If the item is false-y, just return an empty string
          if ( !item ) return ''
  
          // If the item is an array, do a join
          item = $.isArray( item ) ? item.join( '' ) : item
  
          // Check for the class
          klass = klass ? ' class="' + klass + '"' : ''
  
          // Check for any attributes
          attribute = attribute ? ' ' + attribute : ''
  
          // Return the wrapped item
          return '<' + wrapper + klass + attribute + '>' + item + '</' + wrapper + '>'
      }
docs: group 
  Create a dom node string