abort function missing

Was following [this docs page](https://ts.llamaindex.ai/docs/workflows/streaming#integration-with-ui-frameworks) and noticed that the `abort` function is missing

Is there an alternative to stopping the workflow?

<img width="720" height="62" alt="Image" src="https://github.com/user-attachments/assets/a0399ae4-c4fe-403b-b379-62669cad71fd" />