flow like the river

BACK_BACK/node_modules/graphql/jsutils/isPromise.mjs

@@ -0,0 +1,8 @@
+/**
+ * Returns true if the value acts like a Promise, i.e. has a "then" function,
+ * otherwise returns false.
+ */
+// eslint-disable-next-line no-redeclare
+export default function isPromise(value) {
+  return typeof (value === null || value === void 0 ? void 0 : value.then) === 'function';
+}