_hx_table = {}
_hx_table.pack = _G.table.pack or function(...)
    return {...}
end
_hx_table.unpack = _G.table.unpack or _G.unpack
_hx_table.maxn = _G.table.maxn or function(t)
  local maxn=0;
  for i in pairs(t) do
    maxn=type(i)=='number'and i>maxn and i or maxn
  end
  return maxn
end;