proc resume(self: GDScriptFunctionState; arg: Variant = newVariant()): Variant {.
gcsafe,
    locks: 0, raises: [], tags: []
.}

proc isValid(self: GDScriptFunctionState; extendedCheck: bool = false): bool {.
gcsafe,
    locks: 0, raises: [], tags: []
.}

method signalCallback(self: GDScriptFunctionState; variantArgs: varargs[Variant]): Variant {.

    gcsafe, locks: 0, base, raises: [CallError, ValueError], tags: []
.}