hollow/src/main/java/com/netflix/hollow/core/index/GrowingSegmentedLongArray.java
public long get(long index) {
        int segmentIndex = (int)(index >> log2OfSegmentSize);

        if(segmentIndex >= segments.length || segments[segmentIndex] == null)
            return 0;
        
        int longInSegment = (int)(index & bitmask);
        return segments[segmentIndex][longInSegment];
    }
public long get(long index) {
        int segmentIndex = (int)(index >> log2OfSegmentSize);

        if(segmentIndex >= segments.length || segments[segmentIndex] == null)
            return 0;
        
        int longInSegment = (int)(index & bitmask);
        return segments[segmentIndex][longInSegment];
    }
Get the value of the byte at the specified index.
@param index the index
@return the byte value