docs: private NameResolver of(final String targetAuthority, final Helper helper) {
          requireNonNull(targetAuthority, "targetAuthority");
          // Determine target ips
          final String[] hosts = PATTERN_COMMA.split(targetAuthority);
          final List<EquivalentAddressGroup> targets = new ArrayList<>(hosts.length);
          for (final String host : hosts) {
              final URI uri = URI.create("//" + host);
              int port = uri.getPort();
              if (port == -1) {
                  port = helper.getDefaultPort();
              }
              targets.add(new EquivalentAddressGroup(new InetSocketAddress(uri.getHost(), port)));
          }
          if (targets.isEmpty()) {
              throw new IllegalArgumentException("Must have at least one target, but was: " + targetAuthority);
          }
          return new StaticNameResolver(targetAuthority, targets);
      }