1.57.10
(fix): Optional idempotency headers are no longer sent with a Go expression prefix
prepended to their value. An optional<string> idempotency header was sent
with a literal * in front of the caller’s value, and an
optional<base64> one with a literal base64.StdEncoding.EncodeToString(,
because the dereference/encode prefix used to build the value expression was
also interpolated into the fmt.Sprintf format string. Required headers were
unaffected.