proc columns(self: GridContainer): int64 {.
gcsafe, locks: 0, raises: [], tags: []
.}

proc columns=(self: GridContainer; val: int64) {.
gcsafe, locks: 0, raises: [], tags: []
.}

proc getChildControlAtCell(self: GridContainer; row: int64; column: int64): Control {.

    gcsafe, locks: 0, raises: [Exception], tags: [RootEffect]
.}