import com.google.common.annotations.J2ktIncompatible;
import com.google.common.base.Preconditions;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * An implementation of {@link DataOutput} that uses little-endian byte ordering for writing {@code

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * An OutputStream that counts the number of bytes written.
 *
 * @author Chris Nokleberg
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public final class CountingOutputStream extends FilterOutputStream {

  private long count;

  /**

import com.google.common.annotations.Beta;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * An {@link OutputStream} that maintains a hash of the data written to it.
 *
 * @author Zoe Piepmeier
 * @since 16.0
 */
@Beta
@ElementTypesAreNonnullByDefault
public final class HashingOutputStream extends FilterOutputStream {
  private final Hasher hasher;

  /**