@Override
        public boolean reportProblem(P problem) {
            requireNonNull(problem, "problem");
            // first apply filter
            if (!filter.test(problem)) {
                // drop without counting towards preserved problems
                return false;
            }
            int currentCount = totalCount.incrementAndGet();
            getCounter(problem.getSeverity()).increment();

        val fieldName = cachedHeaders.name(index)
        val value = cachedHeaders.value(index)
        if ("Warning".equals(fieldName, ignoreCase = true) && value.startsWith("1")) {
          // Drop 100-level freshness warnings.
          continue
        }
        if (isContentSpecificHeader(fieldName) ||
          !isEndToEnd(fieldName) ||
          networkHeaders[fieldName] == null
        ) {

		// hence not included in the collector path.
		pathComponents = pathComponents[:bucketIdx]
	}

	innerHandler := h.handle(pathComponents, isListingRequest, buckets)

	// Add tracing to the prom. handler
	tracedHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			tc.FuncName = "handler.MetricsV3"

### Die API-Dokumentation testen { #check-the-docs }

Weil die erlaubten Werte für den *Pfad-Parameter* nun vordefiniert sind, kann die interaktive Dokumentation sie als Auswahl-Drop-Down anzeigen:

<img src="/img/tutorial/path-params/image03.png">

### Mit Python-*Enumerationen* arbeiten { #working-with-python-enumerations }

	PMXVI8GER4 VS1, VS2, $1, $2, $3, A1     // 07903012ec811018
	PMXVI8GER4PP VS1, VS2, $1, $2, $3, A1   // 07903012ec811010
	PMXVI8GER4SPP VS1, VS2, $1, $2, $3, A1  // 07903012ec811318
	PNOP                                    // 0700000000000000
	PSTB R1, $1, 12345678(R2)               // 061000bc9822614e
	PSTD R1, $1, 12345678(R2)               // 041000bcf422614e

/// tip | Tipp

Durch das Hinzufügen von `standard` installiert und verwendet Uvicorn einige empfohlene zusätzliche Abhängigkeiten.

Dazu gehört `uvloop`, der hochperformante Drop-in-Ersatz für `asyncio`, der den großen Nebenläufigkeits-Performanz-Schub bietet.

Wenn Sie FastAPI mit etwas wie `pip install "fastapi[standard]"` installieren, erhalten Sie auch `uvicorn[standard]`.

///

</div>

A similar process would apply to any other ASGI server program.

/// tip

By adding the `standard`, Uvicorn will install and use some recommended extra dependencies.

That including `uvloop`, the high-performance drop-in replacement for `asyncio`, that provides the big concurrency performance boost.

When you install FastAPI with something like `pip install "fastapi[standard]"` you already get `uvicorn[standard]` as well.

///

@GwtIncompatible // not worth using in GWT for now
final class CompactLinkedHashMap<K extends @Nullable Object, V extends @Nullable Object>
    extends CompactHashMap<K, V> {
  // TODO(lowasser): implement removeEldestEntry so this can be used as a drop-in replacement

  /** Creates an empty {@code CompactLinkedHashMap} instance. */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      CompactLinkedHashMap<K, V> create() {

    executor.execute(task);
    assertEquals(1, numCalls.get());
  }

  /*
   * Under Android, MyError propagates up and fails the test?
   *
   * TODO(b/218700094): Does this matter to prod users, or is it just a feature of our testing
   * environment? If the latter, maybe write a custom Executor that avoids failing the test when it
   * sees an Error?
   */
  @AndroidIncompatible

}

func BenchmarkMutexSpin(b *testing.B) {
	b.ResetTimer()
	b.ReportAllocs()

	// This benchmark models a situation where spinning in the mutex should be
	// profitable. To achieve this we create a goroutine per-proc.
	// These goroutines access considerable amount of local data so that
	// unnecessary rescheduling is penalized by cache misses.
	m := NewDRWMutex(ds, "")
	var acc0, acc1 uint64
	b.RunParallel(func(pb *testing.PB) {