exec method
Implementation
LuaObject exec({Function? call}) {
final closure = call ?? () => LuaObject.variable('ret_$id', null);
final token = Token.synthesized(id);
final def = FuncExpr.named(
token,
body: [],
args: args,
idParts: [RawExpr(token)],
);
return LuaObject.func(id, def, closure);
}