something is working

node_modules/mongoose/lib/helpers/isAsyncFunction.js

@@ -0,0 +1,22 @@
+'use strict';
+
+let asyncFunctionPrototype = null;
+// try/catch for Babel compatibility, because Babel preset-env requires
+// regenerator-runtime for async/await and we don't want to include that
+// for a simple check.
+try {
+  asyncFunctionPrototype = Object.getPrototypeOf(async function() {});
+} catch (err) {}
+
+if (asyncFunctionPrototype == null) {
+  module.exports = function isAsyncFunction() {
+    return false;
+  };
+} else {
+  module.exports = function isAsyncFunction(v) {
+    return (
+      typeof v === 'function' &&
+      Object.getPrototypeOf(v) === asyncFunctionPrototype
+    );
+  };
+}