[Twisted-Python] conch.ssh.SSHFactory publicKeys and getPublicKeys

Hi, I am writing to ask about the reason why t.conch.ssh.Factory has both the getPublicKeys and getPrivateKeys methods ? The public keys should be string while private keys should be twisted.conch.ssh.keys.Key Based on my understanding if you have a private key object you can extract the public key from it. Are there any SSH key formats which will store a private key without the public components ? Or this is just a legacy code from the time when twisted.conch.ssh.keys.Key was not there... and getPublicKeys should be deprecated? Thanks! -- Adi Roiban