var defineWellKnownSymbol = require('../internals/define-well-known-symbol'); var defineSymbolToPrimitive = require('../internals/symbol-define-to-primitive'); // `Symbol.toPrimitive` well-known symbol // https://tc39.es/ecma262/#sec-symbol.toprimitive defineWellKnownSymbol('toPrimitive'); // `Symbol.prototype[@@toPrimitive]` method // https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive defineSymbolToPrimitive();