class_docstr: The super class for all nodes.
  A node has children, a type and possibly a parent node.
code: def start_pos(self):
      return self.children[0].start_pos
  
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 2 for calling the BaseNode obj's underlying member method code with example usage: obj.start_pos() and returns: self