pylabrobot.liquid_handling.backends.hamilton.STAR_backend.STAR.channels_request_stop_disk_z_positions# async STAR.channels_request_stop_disk_z_positions() → List[float]# Request the stop-disk Z-position of every channel, excluding any mounted tip. Returns: Stop-disk Z (mm) per channel, ordered by channel index (0 = backmost). Return type: List[float]