Function protobuf::reflect::accessor::make_singular_bytes_accessor

pub fn make_singular_bytes_accessor<M: Message + 'static>(name: &'static str,
                                                          has: fn(_: &M) -> bool,
                                                          get: fn<'a>(_: &'a M) -> &'a [u8])
                                                          -> Box<FieldAccessor + 'static>