Macro ffi_support::implement_into_ffi_by_protobuf

macro_rules! implement_into_ffi_by_protobuf {
    ($($FFIType : ty), * $(,) *) => { ... };
}

Implements IntoFfi for the provided types (more than one may be passed in) implementing prost::Message (protobuf auto-generated type) by converting to the type to a ByteBuffer. This ByteBuffer should later be passed by value.

Note: for this to works, the crate it’s called in must depend on prost.

Note: Each type passed in must implement or derive prost::Message.