Moving transaction to core

Author: bigmontz

core/src/internal/observers.ts

@@ -104,3 +104,5 @@ export interface ResultStreamObserver extends StreamObserver {
    */
   subscribe(observer: ResultObserver): void
 }
+
+// @todo implement observers

core/src/result.ts

@@ -297,7 +297,7 @@ class Result implements Promise<QueryResult> {
    * @protected
    * @since 4.0.0
    */
-  private _cancel(): void {
+  _cancel(): void {
     this._streamObserverPromise.then(o => o.cancel())
   }
 }