code: public String getHexStringLower() {
  		int len = getVInt();
  		byte[] hex = new byte[len];
  		System.arraycopy(buf, bufPosition, hex, 0, hex.length);
  		bufPosition += hex.length;
  		return toHex(hex, false);
  	}
docs: Get Hex String in lower case ("0123456789abcdef")
  
  @return
  @see #putHexString(String)
  @see #getHexStringUpper()