}
	return false // zero value
}

// IsLoopback reports whether ip is a loopback address.
func (ip Addr) IsLoopback() bool {
	if ip.Is4In6() {
		ip = ip.Unmap()
	}

	// Requirements for Internet Hosts -- Communication Layers (3.2.1.3 Addressing)
	// https://datatracker.ietf.org/doc/html/rfc1122#section-3.2.1.3
	if ip.Is4() {
		return ip.v4(0) == 127
	}

* Add docs for [self-serving docs' (Swagger UI) static assets](https://fastapi.tiangolo.com/advanced/extending-openapi/#self-hosting-javascript-and-css-for-docs), e.g. to use the docs offline, or without Internet. Initial PR [#557](https://github.com/tiangolo/fastapi/pull/557) by [@svalouch](https://github.com/svalouch).

validated:\n\n- bsonobjectid: a bson object ID, i.e. a 24 characters hex string - uri: an URI as parsed by Golang net/url.ParseRequestURI - email: an email address as parsed by Golang net/mail.ParseAddress - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034]. - ipv4: an IPv4 IP as parsed by Golang net.ParseIP - ipv6: an IPv6 IP as parsed by Golang net.ParseIP - cidr: a CIDR as parsed by Golang net.ParseCIDR - mac: a MAC address as parsed by Golang...

validated:\n\n- bsonobjectid: a bson object ID, i.e. a 24 characters hex string - uri: an URI as parsed by Golang net/url.ParseRequestURI - email: an email address as parsed by Golang net/mail.ParseAddress - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034]. - ipv4: an IPv4 IP as parsed by Golang net.ParseIP - ipv6: an IPv6 IP as parsed by Golang net.ParseIP - cidr: a CIDR as parsed by Golang net.ParseCIDR - mac: a MAC address as parsed by Golang...