bookkeeper-server/src/main/java/org/apache/bookkeeper/util/collections/ConcurrentLongHashSet.java [167:214]:
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        this.sections = new Section[numSections];

        for (int i = 0; i < numSections; i++) {
            sections[i] = new Section(perSectionCapacity, mapFillFactor, mapIdleFactor,
                    autoShrink, expandFactor, shrinkFactor);
        }
    }

    public long size() {
        long size = 0;
        for (Section s : sections) {
            size += s.size;
        }
        return size;
    }

    public long sizeInBytes() {
        long size = 0;
        for (Section s : sections) {
            size += (long) s.table.length * Long.BYTES;
        }
        return size;
    }

    public long capacity() {
        long capacity = 0;
        for (Section s : sections) {
            capacity += s.capacity;
        }
        return capacity;
    }

    public boolean isEmpty() {
        for (Section s : sections) {
            if (s.size != 0) {
                return false;
            }
        }

        return true;
    }

    long getUsedBucketCount() {
        long usedBucketCount = 0;
        for (Section s : sections) {
            usedBucketCount += s.usedBuckets;
        }
        return usedBucketCount;
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bookkeeper-server/src/main/java/org/apache/bookkeeper/util/collections/ConcurrentLongLongHashMap.java [186:233]:
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        this.sections = new Section[numSections];

        for (int i = 0; i < numSections; i++) {
            sections[i] = new Section(perSectionCapacity, mapFillFactor, mapIdleFactor,
                    autoShrink, expandFactor, shrinkFactor);
        }
    }

    public long size() {
        long size = 0;
        for (Section s : sections) {
            size += s.size;
        }
        return size;
    }

    public long sizeInBytes() {
        long size = 0;
        for (Section s : sections) {
            size += (long) s.table.length * Long.BYTES;
        }
        return size;
    }

    public long capacity() {
        long capacity = 0;
        for (Section s : sections) {
            capacity += s.capacity;
        }
        return capacity;
    }

    public boolean isEmpty() {
        for (Section s : sections) {
            if (s.size != 0) {
                return false;
            }
        }

        return true;
    }

    long getUsedBucketCount() {
        long usedBucketCount = 0;
        for (Section s : sections) {
            usedBucketCount += s.usedBuckets;
        }
        return usedBucketCount;
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