utils/src/main/java/jetbrains/exodus/core/dataStructures/hash/LongHashSet.java [60:92]:
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    @Override
    public boolean contains(final long key) {
        final Entry[] table = this.table;
        final int index = HashUtil.indexFor(key, table.length, mask);

        for (Entry e = table[index]; e != null; e = e.hashNext) {
            if (e.key == key) {
                return true;
            }
        }

        return false;
    }

    @Override
    public boolean contains(final Object key) {
        return contains(((Long) key).longValue());
    }

    @Override
    public boolean add(final long key) {
        final Entry[] table = this.table;
        final int index = HashUtil.indexFor(key, table.length, mask);

        for (Entry e = table[index]; e != null; e = e.hashNext) {
            if (e.key == key) {
                return false;
            }
        }

        final Entry e = new Entry(key);
        e.hashNext = table[index];
        table[index] = e;
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utils/src/main/java/jetbrains/exodus/core/dataStructures/hash/LongLinkedHashSet.java [63:95]:
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    @Override
    public boolean contains(final long key) {
        final Entry[] table = this.table;
        final int index = HashUtil.indexFor(key, table.length, mask);

        for (Entry e = table[index]; e != null; e = e.hashNext) {
            if (e.key == key) {
                return true;
            }
        }

        return false;
    }

    @Override
    public boolean contains(final Object key) {
        return contains(((Long) key).longValue());
    }

    @Override
    public boolean add(final long key) {
        final Entry[] table = this.table;
        final int index = HashUtil.indexFor(key, table.length, mask);

        for (Entry e = table[index]; e != null; e = e.hashNext) {
            if (e.key == key) {
                return false;
            }
        }

        final Entry e = new Entry(key);
        e.hashNext = table[index];
        table[index] = e;
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