Package check result: NOTE

Check: examples, Result: NOTE
  Examples with CPU time > 2.5 times elapsed time
                              user system elapsed ratio
  scGate                     6.729  0.023   1.243 5.432
  combine_scGate_multiclass 14.126  0.121   3.167 4.499
  plot_levels                7.596  0.066   2.147 3.569
  plot_UCell_scores          7.993  0.064   2.586 3.116