docs: public void modifyTimeBase() {
          String[] time_grid = new String[6];
          time_grid = timeBaseText.split("-");
  
          String s = "";
          if (_tp.tunit[0] != -1) {
              s += Integer.toString(_tp.tunit[0]);
          } else {
              s += time_grid[0];
          }
          for (int i = 1; i < 6; i++) {
              s += "-";
              if (_tp.tunit[i] != -1) {
                  s += Integer.toString(_tp.tunit[i]);
              } else {
                  s += time_grid[i];
              }
          }
          timeBaseText = s;
      }