pub unsafe extern "C" fn SSL_CREDENTIAL_set_private_key_method(
cred: *mut SSL_CREDENTIAL,
key_method: *const SSL_PRIVATE_KEY_METHOD,
) -> c_int
pub unsafe extern "C" fn SSL_CREDENTIAL_set_private_key_method(
cred: *mut SSL_CREDENTIAL,
key_method: *const SSL_PRIVATE_KEY_METHOD,
) -> c_int