code: function nestedArrayItemBindEventHandlers ($item) {
      // set item from this if not set
      if (!$item || !$item.find) {
          $item = $(this)
      }
      $item.find('.nested-array-item-action-first').click(nestedArrayFirst)
      $item.find('.nested-array-item-action-up').click(nestedArrayUp)
      $item.find('.nested-array-item-action-down').click(nestedArrayDown)
      $item.find('.nested-array-item-action-last').click(nestedArrayLast)
      $item.find('.nested-array-item-action-remove').click(nestedArrayRemove)
      $item.find('.nested-array-item-action-add').click(nestedArrayAdd)
  }
docs: @function nestedArrayItemBindEventHandlers
  
  bind event handlers to nested array item