pub fn serialize<T, S>(
    value: &Option<T>,
    serializer: S,
) -> Result<S::Ok, S::Error>where
    T: Serialize,
    S: Serializer,Expand description
Serializes an optional value using the singleton_map representation.
If the value is Some, it will be serialized using the singleton_map representation.
If the value is None, it will be serialized as null.
§Arguments
- value- A reference to the optional value to be serialized.
- serializer- The serializer to use for serializing the value.
§Returns
A result containing the serialization output or an error if serialization fails.