pylabrobot.opentrons.flex.flex_head.FlexHead8.get_tip_presence# async FlexHead8.get_tip_presence() → str | None# Read this head’s tip sensor: “present”, “absent” or “unknown”. One reading per pipette, not per channel. has_tip_on_hardware() is the same reading as a bool. None when the command reports no status. Return type: str | None