The build tree state is managed by the `BuildTreeState` class.
An instance is created at the start of a build execution and discarded at the end of the execution.

### Build state

The "build state" holds the state for a build within the build definition for a single build execution, and is contained by the build tree state.

The build state is managed by the `BuildState` class.

    long instant = 0L;
    final List<String> events = new ArrayList<>();

    @Override
    public long readMicros() {
      return NANOSECONDS.toMicros(instant);
    }

    void sleepMillis(int millis) {
      sleepMicros("U", MILLISECONDS.toMicros(millis));
    }

    void sleepMicros(String caption, long micros) {
      instant += MICROSECONDS.toNanos(micros);

    long instant = 0L;
    final List<String> events = new ArrayList<>();

    @Override
    public long readMicros() {
      return NANOSECONDS.toMicros(instant);
    }

    void sleepMillis(int millis) {
      sleepMicros("U", MILLISECONDS.toMicros(millis));
    }

    void sleepMicros(String caption, long micros) {
      instant += MICROSECONDS.toNanos(micros);

 *   <li>{@link #set(String, Object)} - Sets a setting value by key.</li>
 *   <li>{@link #array()} - Returns an instance of ArraySettings.</li>
 *   <li>{@link #analyzer()} - Returns an instance of AnalyzerSettings.</li>
 *   <li>{@link #badword()} - Returns an instance of BadWordSettings.</li>
 *   <li>{@link #elevateWord()} - Returns an instance of ElevateWordSettings.</li>
 * </ul>
 *
 * <p>Timeout settings can be accessed via:</p>
 * <ul>

@GwtCompatible
final class Absent<T> extends Optional<T> {
  static final Absent<Object> INSTANCE = new Absent<>();

  @SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override

        return getEntity(form).map(entity -> {
            copyMapToBean(form.attributes, entity, op -> op.exclude(Constants.COMMON_CONVERSION_RULE));
            copyBeanToBean(form, entity, op -> op.exclude(Constants.COMMON_CONVERSION_RULE));
            return entity;
        });
    }

    // ===================================================================================

import static org.apache.maven.api.Constants.MAVEN_HOME;
import static org.apache.maven.api.Constants.MAVEN_INSTALLATION_CONF;

// TODO push all common bits back to plexus cli and prepare for transition to Guice. We don't need 50 ways to make CLIs

/**
 */
@Deprecated
public class MavenCli {

    /**
     * @deprecated Use {@link org.apache.maven.api.Constants#MAVEN_REPO_LOCAL} instead
     */

    this.comparator = comparator;
    checkState((type == Type.SORTED) == (comparator != null));
  }

  /** Returns an instance which specifies that no ordering is guaranteed. */
  public static <S> ElementOrder<S> unordered() {
    return new ElementOrder<>(Type.UNORDERED, null);
  }

  /**
   * Returns an instance which specifies that ordering is guaranteed to be always be the same across

    this.comparator = comparator;
    checkState((type == Type.SORTED) == (comparator != null));
  }

  /** Returns an instance which specifies that no ordering is guaranteed. */
  public static <S> ElementOrder<S> unordered() {
    return new ElementOrder<>(Type.UNORDERED, null);
  }

  /**
   * Returns an instance which specifies that ordering is guaranteed to be always be the same across

    }

    @Test
    @DisplayName("Test getSize always returns 0")
    void testGetSize() {
        // Default instance
        assertEquals(0L, fileBasicInfo.getSize());

        // Instance with values
        FileBasicInfo info =
                new FileBasicInfo(TEST_CREATE_TIME, TEST_LAST_ACCESS_TIME, TEST_LAST_WRITE_TIME, TEST_CHANGE_TIME, TEST_ATTRIBUTES);