code: public void readBytes(byte[] dest, int srcStart, int destStart, int len) {
  
          System.arraycopy(m_buffer, srcStart, dest, destStart, len);
  
      }
docs: Transfers bytes from this buffer to a target byte array.<p>
  
  @param dest the byte array to which the bytes should be transferred
  @param srcStart the start index in this buffer
  @param destStart the start index in the destination buffer
  
  @param len  the number of bytes to transfer