var isPrototypeOf = require('../../internals/object-is-prototype-of'); var method = require('../array/virtual/last-index-of'); var ArrayPrototype = Array.prototype; module.exports = function (it) { var own = it.lastIndexOf; return it === ArrayPrototype || (isPrototypeOf(ArrayPrototype, it) && own === ArrayPrototype.lastIndexOf) ? method : own; };