override val timestampNs: Long,
    override val call: Call,
  ) : CallEvent()

  data class RequestHeadersStart(
    override val timestampNs: Long,
    override val call: Call,
  ) : CallEvent()

  data class RequestHeadersEnd(
    override val timestampNs: Long,
    override val call: Call,
    val headerLength: Long,
  ) : CallEvent() {

    // slightly nearer.
    long floatConversionTest = 0xfffffe8000000002L;
    long doubleConversionTest = 0xfffffffffffff402L;

    for (long i = -3; i <= 3; i++) {
      testLongsBuilder
          .add(i)
          .add(Long.MAX_VALUE + i)
          .add(Long.MIN_VALUE + i)
          .add(Integer.MIN_VALUE + i)
          .add(Integer.MAX_VALUE + i)

    }

    @Override
    @CheckForNull
    public Long previous(Long value) {
      long l = value;
      return (l == Long.MIN_VALUE) ? null : l - 1;
    }

    @Override
    Long offset(Long origin, long distance) {
      checkNonnegative(distance, "distance");
      long result = origin + distance;
      if (result < 0) {
        checkArgument(origin < 0, "overflow");
      }

    @Resource
    protected SystemHelper systemHelper;

    @Resource
    protected IndexingHelper indexingHelper;

    protected boolean finishCrawling = false;

    protected long executeTime;

    protected long documentSize;

    protected int maxIndexerErrorCount = 0;

    protected int maxErrorCount = 2;

    protected List<String> finishedSessionIdList = new ArrayList<>();

    @Override
    protected List<Long> create(Long[] elements) {
      Long[] prefix = {Long.MIN_VALUE, Long.MAX_VALUE};
      Long[] suffix = {86L, 99L};
      Long[] all = concat(concat(prefix, elements), suffix);
      return makeArray(all).subArray(2, elements.length + 2).asList();
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  private static Long[] concat(Long[] a, Long[] b) {

        return this;
    }

    public void setCreatedTime_Equal(Long createdTime) {
        setCreatedTime_Term(createdTime, null);
    }

    public void setCreatedTime_Equal(Long createdTime, ConditionOptionCall<TermQueryBuilder> opLambda) {
        setCreatedTime_Term(createdTime, opLambda);
    }

    public void setCreatedTime_Term(Long createdTime) {
        setCreatedTime_Term(createdTime, null);
    }

    }

    public static String getMemoryUsageLog() {
        final Runtime runtime = Runtime.getRuntime();
        final long freeBytes = runtime.freeMemory();
        final long maxBytes = runtime.maxMemory();
        final long totalBytes = runtime.totalMemory();
        final long usedBytes = totalBytes - freeBytes;

    public abstract long gcdLong(long a, long b);

    public abstract boolean noAddOverflow(int a, int b);

    public abstract boolean noAddOverflow(long a, long b);

    public abstract boolean noMulOverflow(int a, int b);

    public abstract boolean noMulOverflow(long a, long b);
  }

  private final int[] factorials = new int[ARRAY_SIZE];
  private final int[][] binomials = new int[ARRAY_SIZE][2];

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/**
 * {@link Long}用の変換ユーティリティです。
 *
 * @author higa
 */
public abstract class LongConversionUtil {

    /**
     * {@link Long}に変換します。
     *
     * @param o
     *            変換元のオブジェクト
     * @return 変換された{@link Long}
     */
    public static Long toLong(final Object o) {
        return toLong(o, null);
    }

    /**
     * {@link Long}に変換します。
     *
     * @param o