Represents an [RFC 3986](https://datatracker.ietf.org/doc/html/rfc3986) and
[RFC 3987](https://datatracker.ietf.org/doc/html/rfc3987)-compliant URI string.
For example, `"https://example.myshopify.com"` is a valid URL. It includes a scheme (`https`) and a host
(`example.myshopify.com`).