Ability to confirm only certain transitions

Maybe like this

transitions:
    draft:
      label: Create
      from: [__new__]
      to: draft
    propose:
      label: Propose
      from: [__new__, draft, validated, in_assessment, proposed]
      to: proposed
>    confirm: true
    validate:
      label: Validate
      from: [__new__, draft, validated, proposed, deletion_request]
      to: validated