}

  /**
   * Returns the {@link Method} instance for {@link #testCreateWithNullKeyUnsupported()} so that
   * tests can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="https://bugs.openjdk.org/browse/JDK-5045147">JDK-5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getCreateWithNullKeyUnsupportedMethod() {

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### Wir machen Fehler

Wir, als Menschen, machen ständig **Fehler**. Software hat fast *immer* **Bugs**, die an verschiedenen Stellen versteckt sind. 🐛

Und wir als Entwickler verbessern den Code ständig, wenn wir diese Bugs finden und neue Funktionen implementieren (und möglicherweise auch neue Bugs hinzufügen 😅).

### Kleine Fehler automatisch handhaben

  }

  /**
   * Returns the {@link Method} instance for {@link #testAddAll_nullUnsupported()} so that tests can
   * suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="https://bugs.openjdk.org/browse/JDK-5045147">JDK-5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddAllNullUnsupportedMethod() {

   * implementations are permitted to throw IAE if a hole is requested, and we could update
   * test*Hole to permit IAE. (But might this ignore genuine bugs?) But see the TODO above
   * testLower, which could make this all unnecessary
   */
  public static Method[] getHoleMethods() {
    return new Method[] {

    Throwable thrownReflectionFailure = null;
    try {
      helper = new SafeAtomicHelper();
    } catch (Throwable reflectionFailure) { // sneaky checked exception
      // Some Android 5.0.x Samsung devices have bugs in JDK reflection APIs that cause
      // getDeclaredField to throw a NoSuchFieldException when the field is definitely there.
      // For these users fallback to a suboptimal implementation, based on synchronized. This will

import java.util.NoSuchElementException;
import java.util.Set;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Predicate;

/**
 * This should be removed when https://bugs.openjdk.org/browse/JDK-8323729
 * is released in our minimum JDK.
 */
class ImmutableCollections {

    private static final Map<?, ?> EMPTY_MAP = new AbstractImmutableMap<>() {
        @Override

* **Fast to code**: Increase the speed to develop features by about 200% to 300%. *
* **Fewer bugs**: Reduce about 40% of human (developer) induced errors. *
* **Intuitive**: Great editor support. <abbr title="also known as auto-complete, autocompletion, IntelliSense">Completion</abbr> everywhere. Less time debugging.

 * with {@link Collection} itself). Prefer subtypes such as {@link ImmutableSet} or {@link
 * ImmutableList}, which have well-defined {@link #equals} semantics, thus avoiding a common source
 * of bugs and confusion.
 *
 * <h3>About <i>all</i> {@code Immutable-} collections</h3>
 *
 * <p>The remainder of this documentation applies to every public {@code Immutable-} type in this

### We Make Mistakes { #we-make-mistakes }

We, as humans, make **mistakes**, all the time. Software almost *always* has **bugs** hidden in different places. 🐛

And we as developers keep improving the code as we find those bugs and as we implement new features (possibly adding new bugs too 😅).

### Small Errors Automatically Handled { #small-errors-automatically-handled }