Conditional extended group (blueprint)

Hey,

why does the following always show the extended group with fields? Isn’t it possible to conditionally hide a extended group?

  tko_has_quote:
    type: toggle
  tko_quote:
    extends: fields/quote
    when:
      tko_has_quote: true

where fields/quote is:

type: group
fields:

Kind regards

when is a field option, it doesn’t apply to a field group.