to_string
Description:
Converts an enumerated type to a printable string.
Parameters:
| keyring_kind | a KeyringKind, e.g. fwupd_keyring_kind_gpg | 
Returns:
| a string, e.g. `gpg` | 
Converts an enumerated type to a printable string.
| keyring_kind | a KeyringKind, e.g. fwupd_keyring_kind_gpg | 
| a string, e.g. `gpg` |