@spec exception(opts :: Keyword.t()) ::
  %Ltix.Errors.Invalid.ContentItemTypeNotAccepted{
    __exception__: true,
    accept_types: term(),
    bread_crumbs: term(),
    class: term(),
    path: term(),
    spec_ref: term(),
    splode: term(),
    stacktrace: term(),
    type: term(),
    vars: term()
  }