If we define `String` type as `{size_t len, size_t offset, char *data}`, then we can store up to 23 bytes directly in the struct, if we will sacrifice 1 bit of

If we define `String` type as `{size_t len, size_t offset, char *data}`, then we can store up to 23 bytes directly in the struct, if we will sacrifice 1 bit of `len` field to indicate that.