https://github.com/mozilla/pdf.js/blob/0df1a5661958df0c4ed2f73b0f3266d825c5c280/src/display/api.js#L710-L719
The return type signature `@returns {Promise<{num: number, gen: number}>}` is mismatched with its definition. (should be `@returns {Promise<number>}`)
fnArray: [],
        argsArray: [],
        lastChunk: false,
      };
      if (this._stats) {
        this._stats.time("Page Request");
      }
      this._pumpOperatorList({
        pageIndex: this._pageIndex,
        intent: renderingIntent,
        renderInteractiveForms: renderInteractiveForms === true,
        annotationStorage,
      });
    }
    const complete = error => {
      intentState.renderTasks.delete(internalRenderTask);
      
      
      if (this.cleanupAfterRender || renderingIntent === "print") {
        this.pendingCleanup = true;
      }
      this._tryCleanup();
      if (error) {
        internalRenderTask.capability.reject(error);
        this._abortOperatorList({
          intentState,
          reason: error,
        });
      } else {
        internalRenderTask.capability.resolve();