code: def get_ylabel(self):
          
          units = self.units
          if len(units) == 1 and str(units[0]) == '':  # dimensionless
              return ''
          if len(units) == 1 and self.usetex:
              return units[0].to_string('latex')
          elif len(units) == 1:
              return units[0].to_string()
          elif len(units) > 1:
              return 'Multiple units'
          return super(TimeSeries, self).get_ylabel()
docs: Text for y-axis label,  check if channel defines it