code: @Help(
      help =
          "Get all the PhysicalNetworkFunctionDescriptors of a NetworkServiceDescriptor with specific id"
    )
    public List<PhysicalNetworkFunctionDescriptor> getPhysicalNetworkFunctionDescriptors(
        final String idNSD) throws SDKException {
      String url = idNSD + "/pnfdescriptors";
      return Arrays.asList(
          (PhysicalNetworkFunctionDescriptor[])
              requestGetAll(url, PhysicalNetworkFunctionDescriptor.class));
    }
docs: Returns the List of PhysicalNetworkFunctionDescriptors that are contained in a specific
  NetworkServiceDescriptor.
  
  @param idNSD the ID of the NetworkServiceDescriptor
  @return the List of PhysicalNetworkFunctionDescriptors
  @throws SDKException if the request fails