code: def left(self):
      return self.thread or len(self.children) and self.children[0]
  
file_path: catboost/contrib/python/scikit-learn/py3/sklearn/tree/_reingold_tilford.py
imports: import numpy
label_desc: Use image node_id 2 for calling the DrawTree obj's underlying member method code with example usage: obj.left() and returns: unknown