final vByteBuffer append(char c) {
public final vByteBuffer append(char c) {
final vByteBuffer append(char c) {    if (len >= data.length) {	if (prefix == null) {	    prefix = vString.New(data);	} else {	    prefix = prefix.concat(vString.New(data));	}	data = new byte[GrowthSize];	len = 0;    }    data[len++] = (byte) c;    return this;}