docs: function listCacheDelete(key) {
    var data = this.__data__,
      index = assocIndexOf(data, key)
  
    if (index < 0) {
      return false
    }
    var lastIndex = data.length - 1
    if (index == lastIndex) {
      data.pop()
    } else {
      splice.call(data, index, 1)
    }
    return true
  }