docs: def analog_sensor_power(cls, bus, operation):
          """ Method that turns on all of the analog sensor modules
              Includes all attached soil moisture sensors
              Note that all of the SensorCluster object should be attached
                  in parallel and only 1 GPIO pin is available
                  to toggle analog sensor power.
              The sensor power should be left on for at least 100ms
                  in order to allow the sensors to stabilize before reading. 
                  Usage:  SensorCluster.analog_sensor_power(bus,"high")
                  OR      SensorCluster.analog_sensor_power(bus,"low")
              This method should be removed if an off-board GPIO extender is used.
          """
          # Set appropriate analog sensor power bit in GPIO mask
          # using the ControlCluster bank_mask to avoid overwriting any data
          reg_data = get_IO_reg(bus, 0x20, cls.power_bank)
  
          if operation == "on":
              reg_data = reg_data | 1 << cls.analog_power_pin
          elif operation == "off":
              reg_data = reg_data & (0b11111111 ^ (1 << cls.analog_power_pin))
          else:
              raise SensorError(
                  "Invalid command used while enabling analog sensors")
          # Send updated IO mask to output
          IO_expander_output(bus, 0x20, cls.power_bank, reg_data)