usage: gobject-query <qualifier> [-r <type>] [-{i|b} ""] [-s #] [-{h|x|y}]
       -r       specify root type
       -n       don't descend type tree
       -h       show help
       -b       specify indent string
       -i       specify incremental indent string
       -s       specify line spacing
qualifiers:
       froots   iterate over fundamental roots
       tree     print type tree