@Override
    public void excludeAll() {
        check(0);
        includeAll = false;
        included = null;
        excluded = null;
    }
Excludes all segments when reading from this input stream. It is unlikely
that all input should be excluded, instead this method should be used to
clear all includes that have been specifically set.
stroom-data/stroom-data-store-impl-fs/src/main/java/stroom/data/store/impl/fs/RASegmentInputStream.java