UpDownCounter is not a gauge

[ai-zelenin]

meter.AsyncFloat64().Counter acts like gauge so async approach i cant use(do not have counter)
meter.SyncFloat64() do not have gauge so i can not use sync approach

in this examaple

opentelemetry-go/example/prometheus/main.go

Line 61 in d7b3115

gauge, err := meter.SyncFloat64().UpDownCounter("bar", instrument.WithDescription("a fun little gauge"))

meter.SyncFloat64().UpDownCounter called gauge but
meter.SyncFloat64().UpDownCounter acts like counter

i feel there is some mistake here or too confusing and need some clarification