BUI WS Extension - Validation message to merge with standard error message

Summary

Looking for capability to merge custom validation messages with standard out of the box messages in BUI workspace extension

Content

Hi Folks,

I am trying to implement a workspace extension for multi select dropdown that needs validation (mandatory) upon saving of the record, say the agent should select at least one value from the dropdown. Currently, when I click on save without selecting any value, the extension validation happens first and since event is cancelled from my extension, it doesn't show mandatory error for other standard fields on the workspace. Once I select any value in my extension and click on save, then the standard fields are highlighted with mandatory error message.