code: public synchronized final byte[] getBytes() {
          byte[] dest = new byte[data.length];
          System.arraycopy(data, 0, dest, 0, dest.length);
          return dest;
      }
docs: Returns the <tt>byte[]</tt> which is used to store
  the bits of this <tt>BitVector</tt>.
  <p>
  
  @return the <tt>byte[]</tt> used to store the bits.