code: @Help(help = "Create a VNFPackage by uploading a tar file")
    public VNFPackage create(String filePath) throws SDKException {
      log.debug("Start uploading a VNFPackage using the tar at path " + filePath);
      File f = new File(filePath);
      if (f == null || !f.exists()) {
        log.error("No package: " + f.getName() + " found!");
        throw new SDKException(
            "No package: " + f.getName() + " found!",
            new StackTraceElement[0],
            "File " + filePath + " not existing");
      }
      return requestPostPackage(f);
    }
docs: Uploads a VNFPackage to the NFVO.
  
  @param filePath the path to the tar file representing the VNFPackage
  @return the uploaded VNFPackage
  @throws SDKException if the request fails