code: def classdot2class(path):
      
      if path[0] == 'L' and path[-1] == ';':
          log.debug("WARNING: %s already a Lclass; name" % path)
          return path
  
      new_name = 'L' + path.replace('.', '/') + ';'
      return new_name
docs: Convert a path such as 'android.support.v4.app.ActivityCompat'
          into a string 'Landroid/support/v4/app/ActivityCompat'
          so we can change name of a class by d.CLASS_Landroid_support_v4_app_ActivityCompat.set_name(new_name)