docstr: Draw all the serie slices
docstr_tok: ["Draw","all","the","serie","slices"]
code: def _plot(self):
      """Draw all the serie slices"""
      squares = self._squares()
      sq_dimensions = self.add_squares(squares)
  
      for index, serie in enumerate(self.series):
          current_square = self._current_square(squares, index)
          self.gaugify(serie, squares, sq_dimensions, current_square)
  
file_path: pygal/pygal/graph/solidgauge.py
imports: from math import pi, sqrt
  from pygal.graph.graph import Graph
  from pygal.util import alter, decorate
label_desc: Use image node_id 4 for calling the SolidGauge obj's underlying member method code with example usage: obj._plot() without return types