Programmatically Removing & Updating Default Lakehouse Of A Fabric Notebook

Thank you so much for your articles. I have been trying to acheive the same, but I found a strange thng when i experimented with this code. Even though the lakehouses get removed, the trace of is still there. Try observing "synapse_widget" section of the JSON returned by notebookutils.notebook.getDefinition. I am not able to find documentation for all the elements of this JSOn - but synapse widget is listed all the lakehouses (even after the removeall lakehouses code)