code: public static SanitizedContent fromTrustedResourceUrlProto(TrustedResourceUrlProto url) {
      return SanitizedContent.create(
          TrustedResourceUrls.fromProto(url).getTrustedResourceUrlString(),
          ContentKind.TRUSTED_RESOURCE_URI);
    }
docs: Converts a {@link TrustedResourceUrlProto} into a Soy {@link SanitizedContent} of kind
  TRUSTED_RESOURCE_URI.