https://sourceforge.net/tracker/?func=detail&aid=3002045&group_id=152762&atid=785194

It is better if I can have
label="@

{person.firstName}

'-' @

{person.lastName}

"

Workaround exists:
1. Use model to have fullName (@Transient)
2. Use converter - but converter looks not support bean from spring, looks not support let imagine

<window id="personForm" width="auto" height="auto"
border="none" apply="${personForm}">
label="@{person.firstName, converter='${personForm}'}"
</window>