code: private String createString(String f)
      {
          return
              "func="+func+f+
              "gridDimX="+gridDimX+f+
              "gridDimY="+gridDimY+f+
              "gridDimZ="+gridDimZ+f+
              "blockDimX="+blockDimX+f+
              "blockDimY="+blockDimY+f+
              "blockDimZ="+blockDimZ+f+
              "sharedMemBytes="+sharedMemBytes+f+
              "kernelParams="+kernelParams+f+
              "extra="+extra;
      }
docs: Creates and returns a string representation of this object,
  using the given separator for the fields
  
  @param f Separator
  @return A String representation of this object