class_docstr: Base class for maps
docstr: Hook to replace default enumeration on values
code: def enumerate_values(self, serie):
      """Hook to replace default enumeration on values"""
      return enumerate(serie.values)
  
file_path: pygal/pygal/graph/map.py
imports: from pygal.etree import etree
  from pygal.graph.graph import Graph
  from pygal.util import alter, cached_property, cut, decorate
label_desc: Use image node_id 2 for calling the BaseMap obj's underlying member method code with example usage: obj.enumerate_values(serie) and returns: enumerate