code: def name(self):
      return str(self.card_index)
  
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 2 for calling the GpuMemoryGauge obj's underlying member method code with example usage: obj.name() and returns: str