geometry
GEOMETRYCOLLECTION M (GEOMETRYCOLLECTION M (POINT M (30 10 300)))
GEOMETRYCOLLECTION M (GEOMETRYCOLLECTION M (LINESTRING M (30 10 300, 10 30 300, 40 40 1600)))
GEOMETRYCOLLECTION M (GEOMETRYCOLLECTION M (POLYGON M ((30 10 300, 40 40 1600, 20 40 800, 10 20 200, 30 10 300))))
GEOMETRYCOLLECTION M (GEOMETRYCOLLECTION M (MULTIPOINT M ((30 10 300))))
GEOMETRYCOLLECTION M (GEOMETRYCOLLECTION M (MULTILINESTRING M ((30 10 300, 10 30 300, 40 40 1600))))
GEOMETRYCOLLECTION M (GEOMETRYCOLLECTION M (MULTIPOLYGON M (((30 10 300, 40 40 1600, 20 40 800, 10 20 200, 30 10 300)))))
GEOMETRYCOLLECTION M (GEOMETRYCOLLECTION M (POINT M (30 10 300), LINESTRING M (30 10 300, 10 30 300, 40 40 1600), POLYGON M ((30 10 300, 40 40 1600, 20 40 800, 10 20 200, 30 10 300)), MULTIPOINT M ((30 10 300)), MULTILINESTRING M ((30 10 300, 10 30 300, 40 40 1600)), MULTIPOLYGON M (((30 10 300, 40 40 1600, 20 40 800, 10 20 200, 30 10 300)))))

GEOMETRYCOLLECTION M EMPTY