code: def test_validate_toolbar(self):
      with self.assertRaises(traitlets.TraitError):
          Figure(_map=Map(), _toolbar=42)
  
imports: import unittest
  import traitlets
  from ..figure import figure, Figure, FigureLayout
  from ..maps import Map
  from ..toolbar import Toolbar
  from ..errors_box import ErrorsBox
label_desc: Use image node_id 3 for calling the TestFigure obj's underlying member method code with example usage: obj.test_validate_toolbar() without return types