docs: def _print_result_info(traces, events):
      """
      Print a summary of the returned (voltage) traces and spike times
      """
      print_v('Returning %i traces:'%len(traces))
      for r in sorted(traces.keys()):
          x = traces[r]
          print_v('  %s (%s): %s -> %s (min: %s, max: %s, len: %i)'%(r, type(x), x[0],x[-1],min(x),max(x),len(x)))
      print_v('Returning %i events:'%len(events))
      for r in sorted(events.keys()):
          x = events[r]
          print_v('  %s: %s -> %s (len: %i)'%(r, x[0] if len(x)>0 else '-',x[-1] if len(x)>0 else '-',len(x)))