code: def dump_variables(self):
      for name in self._conf_keys:
          self.dump_variable(name)
  
file_path: catboost/contrib/python/numpy/py2/numpy/distutils/fcompiler/environment.py
imports: from __future__ import division, absolute_import, print_function
  import os
  import warnings
  from distutils.dist import Distribution
label_desc: Use image node_id 3 for calling the EnvironmentConfig obj's underlying member method code with example usage: obj.dump_variables() without return types