class_docstr: Base class for maps
docstr: Hook to change the area code
code: def adapt_code(self, area_code):
      """Hook to change the area code"""
      return area_code
  
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 3 for calling the BaseMap obj's underlying member method code with example usage: obj.adapt_code(area_code) and returns: area_code