proc curve(self: Path): Curve3D {.
gcsafe, locks: 0, raises: [Exception],
                              tags: [RootEffect]
.}

proc curve=(self: Path; val: Curve3D) {.
gcsafe, locks: 0, raises: [], tags: []
.}

method curveChanged(self: Path) {.
gcsafe, locks: 0, base, raises: [], tags: []
.}