docs: def _report_volume_count(self):
          """Report volume count per state (dangling or not)"""
          m_func = FUNC_MAP[GAUGE][self.use_histogram]
  
          attached_volumes = self.docker_util.client.volumes(filters={'dangling': False})
          dangling_volumes = self.docker_util.client.volumes(filters={'dangling': True})
          attached_count = len(attached_volumes.get('Volumes', []) or [])
          dangling_count = len(dangling_volumes.get('Volumes', []) or [])
          m_func(self, 'docker.volume.count', attached_count, tags=['volume_state:attached'])
          m_func(self, 'docker.volume.count', dangling_count, tags=['volume_state:dangling'])