planning

node_modules/graphql/jsutils/isAsyncIterable.js.flow

@@ -0,0 +1,14 @@
+// @flow strict
+import { SYMBOL_ASYNC_ITERATOR } from '../polyfills/symbols';
+
+/**
+ * Returns true if the provided object implements the AsyncIterator protocol via
+ * either implementing a `Symbol.asyncIterator` or `"@@asyncIterator"` method.
+ */
+declare function isAsyncIterable(value: mixed): boolean %checks(value instanceof
+  AsyncIterable);
+
+// eslint-disable-next-line no-redeclare
+export default function isAsyncIterable(maybeAsyncIterable) {
+  return typeof maybeAsyncIterable?.[SYMBOL_ASYNC_ITERATOR] === 'function';
+}