Mainly useful for debugging and to see the content with develop. tools. For now it just outputs the JSON string, but this might change to something more concise. Change-Id: I5641d20f292495f5474755ab9c3b651f67aa6f6e Reviewed-on: https://gerrit.libreoffice.org/c/core/+/195617 Tested-by: Jenkins Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>