SwiftDocCOutOfProcessReferenceResolverOutOfProcessReferenceResolver.ResolvedInformationOutOfProcessReferenceResolver.ResolvedInformation.VarianturlInstance PropertyurlThe url of the variant or nil if the url is the same as the resolved information.let url: Optional<URL>DeprecatedThis type is only used in the outdated, and no longer recommended, version of the out-of-process external resolver communication protocol.