This is tricky because we can't easily override '+' for base 'raw' type. But if the first operand is 'raw_bytes', it works. If the first operand is 'raw', we might need to cast it.
This is tricky because we can't easily override '+' for base 'raw' type. But if the first operand is 'raw_bytes', it works. If the first operand is 'raw', we might need to cast it.