type MetricType int

const (
	// CounterMT - represents a counter metric.
	CounterMT MetricType = iota
	// GaugeMT - represents a gauge metric.
	GaugeMT
	// HistogramMT - represents a histogram metric.
	HistogramMT
)

// rangeL - represents a range label.
const rangeL = "range"

func (mt MetricType) String() string {
	switch mt {
	case CounterMT:
		return "counter"
	case GaugeMT:
		return "gauge"
	case HistogramMT:

    return isEmpty() ? null : getEntry(0);
  }

  @Override
  public @Nullable Entry<E> lastEntry() {
    return isEmpty() ? null : getEntry(length - 1);
  }

  @Override
  public int count(@Nullable Object element) {
    int index = elementSet.indexOf(element);
    return (index >= 0) ? getCount(index) : 0;
  }

  @Override
  public int size() {

import org.bouncycastle.crypto.generators.KDFCounterBytesGenerator;
import org.bouncycastle.crypto.macs.HMac;
import org.bouncycastle.crypto.params.KDFCounterParameters;

/**
 * SMB3 SP800-108 Counter Mode Key Derivation
 *
 * @author mbechler
 *
 */
public final class Smb3KeyDerivation {

    private static final byte[] SIGNCONTEXT_300 = toCBytes("SmbSign");

    assertEquals("", matcher.removeFrom(""));
    assertEquals("", matcher.replaceFrom("", 'z'));
    assertEquals("", matcher.replaceFrom("", "ZZ"));
    assertEquals("", matcher.trimFrom(""));
    assertEquals(0, matcher.countIn(""));
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  private static void doTestNull(CharMatcher matcher) throws Exception {
    NullPointerTester tester = new NullPointerTester();

    }

    /**
     * Constructs a localized page path with language and country.
     *
     * @param page the page name
     * @param lang the language code
     * @param country the country code
     * @return the localized page path
     */
    private String getLocalizedPagePath(final String page, final String lang, final String country) {
        final StringBuilder buf = new StringBuilder(100);

        securityDescriptorBytes[22] = 8; // ACL size (low byte)
        securityDescriptorBytes[23] = 0; // ACL size (high byte)
        securityDescriptorBytes[24] = 0; // ACE count (low byte) - 0 ACEs
        securityDescriptorBytes[25] = 0; // ACE count (high byte)
        securityDescriptorBytes[26] = 0; // sbz2 (low byte)
        securityDescriptorBytes[27] = 0; // sbz2 (high byte)

        assertEquals(0x00, dst3[6]);
    }

    @Test
    @DisplayName("Test setup count initialization")
    void testSetupCountInitialization() {
        notifyChange = new NtTransNotifyChange(mockConfig, 0x1234, FILE_NOTIFY_CHANGE_FILE_NAME, false);

        // The setup count should be initialized to 0x04 in the constructor
        // We can't directly access it, but we can verify the behavior is correct

      }
    }
  }

  private static class CountingIterable implements Iterable<String> {
    int count = 0;

    @Override
    public Iterator<String> iterator() {
      count++;
      return asList("a", "b", "a").iterator();
    }
  }

  public void testCopyOf_plainIterable() {
    CountingIterable iterable = new CountingIterable();

  }

  @Override
  public Set<E> edgesConnecting(N node) {
    return new MultiEdgesConnecting<E>(outEdgeMap, node) {
      @Override
      public int size() {
        return successorsMultiset().count(node);
      }
    };
  }

  @Override
  public N removeInEdge(E edge, boolean isSelfLoop) {
    N node = super.removeInEdge(edge, isSelfLoop);

  }

  @Override
  public Set<E> edgesConnecting(N node) {
    return new MultiEdgesConnecting<E>(outEdgeMap, node) {
      @Override
      public int size() {
        return successorsMultiset().count(node);
      }
    };
  }

  @Override
  public N removeInEdge(E edge, boolean isSelfLoop) {
    N node = super.removeInEdge(edge, isSelfLoop);