static int skipVaruint64(PositionedByteRange src, boolean cmp) {
    final int len = lengthVaruint64(src, cmp);
    src.setPosition(src.getPosition() + len);
    return len;
  }
Skip {@code src} over the encoded varuint64.
@param src source buffer
@param cmp if true, parse the compliment of the value.
@return the number of bytes skipped.
hbase-common/src/main/java/org/apache/hadoop/hbase/util/OrderedBytes.java