geometry
GEOMETRYCOLLECTION (GEOMETRYCOLLECTION (POINT (30 10)))
GEOMETRYCOLLECTION (GEOMETRYCOLLECTION (LINESTRING (30 10, 10 30, 40 40)))
GEOMETRYCOLLECTION (GEOMETRYCOLLECTION (POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))))
GEOMETRYCOLLECTION (GEOMETRYCOLLECTION (MULTIPOINT ((30 10))))
GEOMETRYCOLLECTION (GEOMETRYCOLLECTION (MULTILINESTRING ((30 10, 10 30, 40 40))))
GEOMETRYCOLLECTION (GEOMETRYCOLLECTION (MULTIPOLYGON (((30 10, 40 40, 20 40, 10 20, 30 10)))))
GEOMETRYCOLLECTION (GEOMETRYCOLLECTION (POINT (30 10), LINESTRING (30 10, 10 30, 40 40), POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10)), MULTIPOINT ((30 10)), MULTILINESTRING ((30 10, 10 30, 40 40)), MULTIPOLYGON (((30 10, 40 40, 20 40, 10 20, 30 10)))))

GEOMETRYCOLLECTION EMPTY