class_docstr: Leafs are basically tokens with a better API. Leafs exactly know where they
  were defined and what text preceeds them.
code: def __repr__(self):
      value = self.value
      if not value:
          value = self.type
      return "<%s: %s>" % (type(self).__name__, value)
  
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 9 for calling the Leaf obj's underlying member method code with example usage: obj.__repr__() and returns: unknown