code: def sources_files(self):
      ret = [
          self.csrc_abs_path("cpu_adam.cpp"),
      ]
      return ret
  
file_path: ColossalAI/colossalai/kernel/op_builder/cpu_adam.py
imports: from .builder import Builder
  from .utils import append_nvcc_threads
label_desc: Use image node_id 2 for calling the CPUAdamBuilder obj's underlying member method code with example usage: obj.sources_files() and returns: ret