class_docstr: The super class for all nodes.
  A node has children, a type and possibly a parent node.
class_docstr_tok: ["The","super","class","for","all","nodes",".","A","node","has","children",",","a","type","and","possibly","a","parent","node","."]
code: def get_start_pos_of_prefix(self):
      return self.children[0].get_start_pos_of_prefix()
  
imports: import sys
  from abc import abstractmethod, abstractproperty
  from parso._compatibility import utf8_repr, encoding
  from parso.utils import split_lines
label_desc: Use image node_id 3 for calling the BaseNode obj's underlying member method code with example usage: obj.get_start_pos_of_prefix() and returns: self