docs: private List<BoxFileUploadSessionPart> getParts(JsonArray partsArray) {
          List<BoxFileUploadSessionPart> parts = new ArrayList<BoxFileUploadSessionPart>();
          for (JsonValue value: partsArray) {
              BoxFileUploadSessionPart part = new BoxFileUploadSessionPart((JsonObject) value);
              parts.add(part);
          }
          return parts;
      }