code: public AsnInputStream readSequenceStreamData(int length) throws AsnException, IOException {
  
  		if (length == Tag.Indefinite_Length) {
  			return this.readSequenceIndefinite();
  		} else {
  			int startPos = this.pos;
  			this.advance(length);
  			return new AsnInputStream(this, startPos, length);
  		}
  	}
docs: This method can be invoked after the sequence tag and length has been
  read. Returns the AsnInputStream that contains the sequence data. The origin
  stream advances to the begin of the next record
  
  @param length
  The sequence length
  @return
  @throws AsnException
  @throws IOException