{
  "function": "combine",
  "description": "Returns the combination of two geometries.",
  "arguments": [ {"arg":"geometry1","description":"a geometry"},
                 {"arg":"geometry2","description":"a geometry"}],
  "examples": [ { "expression":"geom_to_wkt( combine( geom_from_wkt( 'LINESTRING(3 3, 4 4, 5 5)' ), geom_from_wkt( 'LINESTRING(3 3, 4 4, 2 1)' ) ) )", "returns":"MULTILINESTRING((4 4, 2 1), (3 3, 4 4), (4 4, 5 5))"},
  { "expression":"geom_to_wkt( combine( geom_from_wkt( 'LINESTRING(3 3, 4 4)' ), geom_from_wkt( 'LINESTRING(3 3, 6 6, 2 1)' ) ) )", "returns":"LINESTRING(3 3, 4 4, 6 6, 2 1)"}
  ]
}