code: def test_invalid_multipoint(self):
      mpoint = geojson.MultiPoint(
          [
              (3.5887,),
              (3.5887, 10.44558),
              (2.5555, 3.887, 4.56),
              (2.44, 3.44, 2.555, 4.56),
          ]
      )
      self.assertEqual(mpoint.is_valid, False)
  
imports: import unittest
  import geojson
label_desc: Use image node_id 1 for calling the TestValidationMultipoint obj's underlying member method code with example usage: obj.test_invalid_multipoint() without return types