def verify_geom(self, geom, model_field):
        """
        Verifies the geometry -- will construct and return a GeometryCollection
        if necessary (for example if the model field is MultiPolygonField while
        the mapped shapefile only contains Polygons).
        """
        # Downgrade a 3D geom to a 2D one, if necessary.
        if self.coord_dim is not geom.coord_dim:
            geom.coord_dim = self.coord_dim

        if self.make_multi(geom.geom_type, model_field):
            # Constructing a multi-geometry type to contain the single geometry
            multi_type = self.MULTI_TYPES[geom.geom_type.num]
            g = OGRGeometry(multi_type)
            g.add(geom)
        else:
            g = geom

        # Transforming the geometry with our Coordinate Transformation object,
        # but only if the class variable `transform` is set w/a CoordTransform
        # object.
        if self.transform: g.transform(self.transform)

        # Returning the WKT of the geometry.
        return g.wkt

    #### Other model methods ####
dataset/ETHPy150Open adieu/django-nonrel/django/contrib/gis/utils/layermapping.py/LayerMapping.verify_geom/operator `!=` -> `is not`