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node_modules/core-js/internals/a-constructor.js

@@ -0,0 +1,11 @@
+'use strict';
+var isConstructor = require('../internals/is-constructor');
+var tryToString = require('../internals/try-to-string');
+
+var $TypeError = TypeError;
+
+// `Assert: IsConstructor(argument) is true`
+module.exports = function (argument) {
+  if (isConstructor(argument)) return argument;
+  throw new $TypeError(tryToString(argument) + ' is not a constructor');
+};