standardize

Author: yaacovCR

src/execution/IncrementalGraph.ts

@@ -306,9 +306,9 @@ export class IncrementalGraph {
     let streamItemRecord: StreamItemRecord | undefined;
     while ((streamItemRecord = streamItemQueue.shift()) !== undefined) {
       let result =
-        typeof streamItemRecord === 'function'
-          ? streamItemRecord().value
-          : streamItemRecord.value;
+        streamItemRecord instanceof BoxedPromiseOrValue
+          ? streamItemRecord.value
+          : streamItemRecord().value;
       if (isPromise(result)) {
         if (items.length > 0) {
           this._enqueue({