MarsSeed [1] filed a deletion request for omniorb417 [2]: Unused EOL legacy library built with Python2 support. This was released in 2013.
Not a compatible drop-in replacement for the current omniorb, which requires Python3. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/omniorb417/