hollow/src/main/java/com/netflix/hollow/core/memory/ThreadSafeBitSet.java
public void clearAll() {
        ThreadSafeBitSetSegments segments = this.segments.get();

        for(int i=0;i<segments.numSegments();i++) {
            AtomicLongArray segment = segments.getSegment(i);

            for(int j=0;j<segment.length();j++) {
                segment.set(j, 0L);
            }
        }
    }
public void clearAll() {
        ThreadSafeBitSetSegments segments = this.segments.get();

        for(int i=0;i<segments.numSegments();i++) {
            AtomicLongArray segment = segments.getSegment(i);

            for(int j=0;j<segment.length();j++) {
                segment.set(j, 0L);
            }
        }
    }
Clear all bits to 0.