var getBuiltIn = require('../internals/get-built-in'); var createEmptySetLike = function () { return { size: 0, has: function () { return false; }, keys: function () { return { next: function () { return { done: true }; } }; } }; }; module.exports = function (name) { try { var Set = getBuiltIn('Set'); new Set()[name](createEmptySetLike()); return true; } catch (error) { return false; } };