//! Serialize/deserialize `nil`able value into `T`, where `nil` turns into the `Default` value.
//!
//! Serialize any value of `T`, including the default value,
//! using the serialization for `Some` variant of `Option<T>`.
//!
//! This helper can be used to tolerate `nil` values from a serialization producer,
//! while the default value is normatively serialized as such.
use ;
/// Deserialize `T` from a `nil`-able representation, accepting the `nil`
/// Serialize `T` as `Some` value of `Option<T>`.