in src/main/java/org/apache/sling/scripting/javascript/io/EspReader.java [325:337]
public long skip(long n) throws IOException {
if (n < 0L) {
throw new IllegalArgumentException("skip value is negative");
}
long i = -1;
while (++i < n) {
if (doRead() < 0) {
break;
}
}
return i;
}