public void
readByteArray(byte [] b, int off, int len) throws WireParseException {
	require(len);
	byteBuffer.get(b, off, len);
}
Reads a byte array of a specified length from the stream into an existing
array.
@param b The array to read into.
@param off The offset of the array to start copying data into.
@param len The number of bytes to copy.
@throws WireParseException The end of the stream was reached.
src/main/java/core/org/xbill/DNS/DNSInput.java