code: def test_collect_single_force_multi(self):
      result = collect(self.p1, multi=True)
      expected = MultiPoint([self.p1])
      assert expected.equals(result)
  
file_path: geopandas/geopandas/tools/tests/test_tools.py
imports: from shapely.geometry import LineString, MultiPoint, Point
  from geopandas import GeoSeries
  from geopandas.tools import collect
  import pytest
label_desc: Use image node_id 3 for calling the TestTools obj's underlying member method code with example usage: obj.test_collect_single_force_multi() without return types