-record(builder, {
    request :: gleam@http@request:request(binary()),
    init_timeout :: gleam@option:option(integer()),
    init :: fun(() -> {any(),
        gleam@option:option(gleam@erlang@process:selector(any()))}),
    loop :: fun((stratus:message(any()), any(), stratus:connection()) -> gleam@otp@actor:next(any(), any())),
    on_close :: fun((any()) -> nil)
}).