code: def setUp(self):
      self.system_memory_gb = psutil.virtual_memory().total / float(
          2**30
      )
  
file_path: neptune-client/tests/unit/neptune/legacy/internal/hardware/gauges/test_memory_gauges.py
imports: import unittest
  import psutil
  from neptune.common.hardware.gauges.gauge_factory import CGroupMemoryUsageGauge, SystemMemoryUsageGauge
label_desc: Use image node_id 1 for calling the TestMemoryGauges obj's underlying member method code with example usage: obj.setUp() without return types