code: def value(self):
      return self.__gpu_monitor.get_card_used_memory_in_bytes(
          self.card_index
      ) / float(BYTES_IN_ONE_GB)
  
file_path: neptune-client/src/neptune/common/hardware/gauges/gpu.py
imports: from neptune.common.hardware.constants import BYTES_IN_ONE_GB
  from neptune.common.hardware.gauges.gauge import Gauge
  from neptune.common.hardware.gpu.gpu_monitor import GPUMonitor
label_desc: Use image node_id 3 for calling the GpuMemoryGauge obj's underlying member method code with example usage: obj.value() and returns: unknown