Function getConstructor

lib/web/polyfill.js:1374–1377

(C)

      notify(record, true);
    }
    function getConstructor(C){
      var S = assertObject(C)[SYMBOL_SPECIES];
      return S != undefined ? S : C;
    }
    // 25.4.3.1 Promise(executor)
    Promise = function(executor){
      assertFunction(executor);