pub unsafe extern "C" fn PEM_write_bio_PKCS8PrivateKey(
arg1: *mut bio_st,
arg2: *const evp_pkey_st,
arg3: *const evp_cipher_st,
kstr: *const i8,
klen: i32,
cb: Option<unsafe extern "C" fn(_: *mut i8, _: i32, _: i32, _: *mut c_void) -> i32>,
u: *mut c_void,
) -> i32