Function deserialize_any_with_raw_strings 

pub fn deserialize_any_with_raw_strings<'de, D, V>(
    deserializer: D,
    visitor: V,
) -> Result<V::Value, D::Error>
where
    D: Deserializer<'de>,
    V: Visitor<'de>,

Deserializes any MaxMind DB value while exposing strings as raw bytes.

This helper is intended for format adapters that validate strings while converting them to another runtime’s native string type. MMDB string values are delivered to Visitor::visit_newtype_struct, which the adapter’s visitor must implement. Its nested deserializer answers every deserialize_* call with Visitor::visit_borrowed_bytes; calling Deserializer::deserialize_bytes is the conventional choice. Genuine MMDB byte values continue to be delivered directly to Visitor::visit_borrowed_bytes, so callers can distinguish the two types.

Callers decoding nested maps or arrays should invoke this helper again from the DeserializeSeed used for each nested value. Map keys can be read as unvalidated bytes with Deserializer::deserialize_identifier. Raw-string mode applies only to the value for which this helper is invoked. Nested values decoded without re-invoking it silently use normal string decoding, including the unsafe-str-decode behavior when that feature is enabled. Pointers are followed transparently and preserve the selected mode.

This function has its special effect only with this crate’s deserializer; other Serde deserializers may treat the request as an ordinary newtype struct. The adapter is responsible for ensuring strict UTF-8 validation if malformed database strings must remain errors, as some runtimes replace invalid sequences instead. Unlike the unsafe-str-decode feature, this function itself never constructs an unvalidated Rust str.