code: public boolean canUploadVersion(String name, long fileSize) {
  
          URL url = CONTENT_URL_TEMPLATE.build(this.getAPI().getBaseURL(), this.getID());
          BoxJSONRequest request = new BoxJSONRequest(this.getAPI(), url, "OPTIONS");
  
          JsonObject preflightInfo = new JsonObject();
          if (name != null) {
              preflightInfo.add("name", name);
          }
  
          preflightInfo.add("size", fileSize);
  
          request.setBody(preflightInfo.toString());
          try {
              BoxAPIResponse response = request.send();
  
              return response.getResponseCode() == 200;
          } catch (BoxAPIException ex) {
  
              if (ex.getResponseCode() >= 400 && ex.getResponseCode() < 500) {
                  // This looks like an error response, menaing the upload would fail
                  return false;
              } else {
                  // This looks like a network error or server error, rethrow exception
                  throw ex;
              }
          }
      }
docs: Checks if a new version of the file can be uploaded with the specified name and size.
  @param name the new name for the file.
  @param fileSize the size of the new version content in bytes.
  @return whether or not the file version can be uploaded.