class_docstr: Base class for maps
docstr: Getter for series values (flattened)
code: def _values(self):
      """Getter for series values (flattened)"""
      return [
          val[1]
          for serie in self.series
          for val in serie.values
          if val[1] is not None
      ]
  
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 1 for calling the BaseMap obj's underlying member method code with example usage: obj._values() and returns: unknown