Overriding fieldset in a decorator isn't rendering inside tabs

[slyadams]

Expected

I expected that I could override the fieldset add on (or create a new one) and adding to the bootstrap decorator would mean I can customize how fieldsets are rendered (I'm trying to refactor an existing hand rolled form engine so needed to style mine to be as close to the existing as possible).

Actually

I defined it and it worked fine in fields in the form, but when using fieldsets inside tabs, it rendered my new fieldset item and legend, but none of the fields appeared.

Gist/Plunker/Demo

Plunkr showing a fieldset override
Plunkr showing trying a new fieldset definition

@json-schema-form/angular-schema-form-lead

[Anthropic]

Hi @slyadams fieldset is a core type like string, it has code in the core that manages its behaviour and the child recursion, so to override it would require it to have its own copy of that internal code, not sure why the simpleTransclusion doesn't cover it, I actually thought it would have.