QGIS/resources/function_help/json/is_empty_or_null

{
  "name": "is_empty_or_null",
  "type": "function",
  "groups": ["GeometryGroup"],
  "description": "Returns true if a geometry is NULL or empty (without coordinates) or false otherwise. This function is like the expression '$geometry IS NULL or is_empty($geometry)'",
  "arguments": [ {"arg":"geometry","description":"a geometry"}],
  "examples": [ { "expression":"is_empty_or_null(NULL)", "returns":"true"},
                { "expression":"is_empty_or_null(geom_from_wkt('LINESTRING(0 0, 1 1, 2 2)'))", "returns":"false"},
                { "expression":"is_empty_or_null(geom_from_wkt('LINESTRING EMPTY'))", "returns":"true"},
                { "expression":"is_empty_or_null(geom_from_wkt('POINT(7 4)'))", "returns":"false"},
                { "expression":"is_empty_or_null(geom_from_wkt('POINT EMPTY'))", "returns":"true"} ]
}