<t:beaneditform class="donkey" t:id="phone" submitlabel="message:create-button"/>
Does not render donkey (or class="donkey").
It does render once the t:mixins="renderInformals" is added.
Some comment from Lance:
It seems that the beanEditForm needs a one-liner added to it
It seems that BeanEditor has the same bug. Pls put that in the Jira too
Might be an idea to search all components with @SupportsInformalParameters
that don't call renderInformalParameters to find any others