code: def test_valid_multipolygon(self):
      poly1 = [
          [
              (2.38, 57.322),
              (23.194, -20.28),
              (-120.43, 19.15),
              (2.38, 57.322),
          ]
      ]
      poly2 = [
          [(-5.34, 3.71), (28.74, 31.44), (28.55, 19.10), (-5.34, 3.71)]
      ]
      poly3 = [
          [(3.14, 23.17), (51.34, 27.14), (22, -18.11), (3.14, 23.17)]
      ]
      multipoly = geojson.MultiPolygon([poly1, poly2, poly3])
      self.assertEqual(multipoly.is_valid, True)
  
imports: import unittest
  import geojson
label_desc: Use image node_id 2 for calling the TestValidationMultiPolygon obj's underlying member method code with example usage: obj.test_valid_multipolygon() without return types