code: def build_spark(self):
      from fate.arch.computing.backends.spark import CSession
  
      return CSession(self._computing_session_id)
  
file_path: FATE/python/fate/arch/computing/_builder.py
imports: import typing
  from fate.arch.computing.api import ComputingEngine
  from fate.arch.config import cfg
label_desc: Use image node_id 5 for calling the ComputingBuilder obj's underlying member method code with example usage: obj.build_spark() and returns: CSession