code: def build_name(self, name):
      full_name = []
      if self.namespace:
          full_name.append(self.namespace)
      if self.subsystem:
          full_name.append(self.subsystem)
      full_name.append(name)
      return "_".join(full_name)
  
file_path: distributed/distributed/http/prometheus.py
imports: from __future__ import annotations
  from importlib import import_module
  import dask.config
  from distributed.http.utils import RequestHandler
label_desc: Use image node_id 2 for calling the PrometheusCollector obj's underlying member method code with example usage: obj.build_name(name) and returns: str