code: func Open(l *lua.State) {
  	reOpen := func(l *lua.State) int {
  		lua.NewLibrary(l, regexpLibrary)
  		return 1
  	}
  	lua.Require(l, "goluago/regexp", reOpen, false)
  	l.Pop(1)
  }
docs: // Open exposes the regexp functions to Lua code in the `goluago/regexp`
  // namespace.