code: @Nonnull
    public static ESuccess sleepMinutes (@Nonnegative final long nMinutes)
    {
      ValueEnforcer.isGE0 (nMinutes, "Minutes");
      return sleep (nMinutes * CGlobal.MILLISECONDS_PER_MINUTE);
    }
docs: Sleep the current thread for a certain amount of time
  
  @param nMinutes
  The minutes to sleep. Must be &ge; 0.
  @return {@link ESuccess#SUCCESS} if sleeping was not interrupted,
  {@link ESuccess#FAILURE} if sleeping was interrupted