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