code: function _getWishIndexById(id) {
    let wishIndex = -1
    if (_isArray(id)) {
      const wishIndexes = []
      _each(id, wishId => {
        wishIndexes.push(_getWishIndexById(wishId))
      })
      return wishIndexes
    } else {
      _each(_wishes, (aWish, index) => {
        if (aWish.id === id) {
          wishIndex = index
          return false
        }
      })
      return wishIndex
    }
  }
docs: Gets a wish from the _wishes array by its ID
  @param {wishIds} id
  @returns {wish|Array.<wish>}
  @private