Macro impl_raw_serializable_primefield64 

macro_rules! impl_raw_serializable_primefield64 {
    () => { ... };
}

A simple macro which allows us to implement the RawSerializable trait for any 64-bit field. The field must implement PrimeField64 (and should not implement PrimeField32).

This macro doesn’t need any inputs as the implementation is identical for all 64-bit fields.