public final Object mutex = new Object[0]; // something Serializable

  protected <K, V> Map<K, V> create() {
    TestMap<K, V> inner = new TestMap<>(new HashMap<K, V>(), mutex);
    Map<K, V> outer = Synchronized.map(inner, mutex);
    return outer;
  }

  static class TestMap<K, V> extends ForwardingMap<K, V> implements Serializable {
    public final Object mutex;
    private final Map<K, V> delegate;

        .isEqualTo("fooBar");
  }

  public void testConverter_nullConversions() {
    for (CaseFormat outer : CaseFormat.values()) {
      for (CaseFormat inner : CaseFormat.values()) {
        assertThat(outer.converterTo(inner).convert(null)).isNull();
        assertThat(outer.converterTo(inner).reverse().convert(null)).isNull();
      }
    }
  }

  public void testConverter_toString() {

            Exception innermost = new IOException("Innermost exception");
            Exception middle = new RuntimeException("Middle exception", innermost);
            Exception rootCause = new IllegalStateException("Outer exception", middle);
            TransportException exception = new TransportException("Transport failed", rootCause);

            String result = exception.toString();

            assertNotNull(result);

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Outer class that exists solely to let us write {@code Partially.GwtIncompatible} instead of plain
 * {@code GwtIncompatible}. This is more accurate for {@link Futures#catching}, which is available

    assertThat(toTest).isEqualTo("FooBar{}");
  }

  @GwtIncompatible // Class names are obfuscated in GWT
  public void testToStringHelper_localInnerClass() {
    // Local inner classes have names ending like "Outer.$1Inner"
    class LocalInnerClass {}
    String toTest = MoreObjects.toStringHelper(new LocalInnerClass()).toString();
    assertThat(toTest).isEqualTo("LocalInnerClass{}");
  }

    matchesName(name.asString(), candidateName)


private
fun matchesName(name: String, candidateName: String) =
    name == candidateName.replace(".*\\$".toRegex(), "") // strip outer class names

private
val SINCE_REGEX = Regex("""@since ([^\s]+)""")

private
fun BodyDeclaration<*>.getSince(): String? =
    comment?.orElse(null)?.content?.let { content ->

        String url = "http://example.com/test";
        String message = "Outer error message";
        Exception innerCause = new IllegalArgumentException("Inner cause");
        Exception middleCause = new IllegalStateException("Middle cause", innerCause);
        Exception outerCause = new RuntimeException("Outer cause", middleCause);

    <module name="NoLineWrap" />

    <!-- only one statement per line should be allowed -->
    <module name="OneStatementPerLine" />

    <!-- Each java file has only one outer class -->
    <module name="OneTopLevelClass" />

    <!-- The suffix L is preferred, because the letter l (ell) is often
      hard to distinguish from the digit 1 (one). -->
    <module name="UpperEll" />

    private static final Logger logger = LogManager.getLogger(RelatedQueryHelper.class);

    /**
     * Map storing related queries organized by virtual host key and search term.
     * The outer map key is the virtual host key, the inner map key is the search term
     * (in lowercase), and the value is an array of related query strings.
     */

    checkNotNull(target, "target");
    if (target.length == 0) {
      return 0;
    }

    outer:
    for (int i = 0; i < array.length - target.length + 1; i++) {
      for (int j = 0; j < target.length; j++) {
        if (array[i + j] != target[j]) {
          continue outer;
        }
      }
      return i;
    }
    return -1;
  }

  /**