@Nullable public static JsonParser enterPath(JsonParser parser, String path1, String path2)
    throws IOException {
    return enterPath(parser, path1) != null ? enterPath(parser, path2) : null;
  }
Navigates to a field of a JSON-serialized object. For example,

<pre>{@code
JsonParser status = enterPath(JsonAdapters.jsonParser(stream), "message", "status");
if (status != null) throw new IllegalStateException(status.nextString());
}</pre>
zipkin-storage/elasticsearch/src/main/java/zipkin2/elasticsearch/internal/JsonReaders.java