utils/src/main/java/jetbrains/exodus/core/dataStructures/persistent/PersistentBitTreeLongMap.java [80:99]:
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            if (root == null) {
                return null;
            }
            return root.getByWeight(index);
        }

        @SuppressWarnings("unchecked")
        @Override
        public V get(long key) {
            final Entry entry = getEntryByIndex(getEntryIndex(key));
            if (entry == null) {
                return null;
            }
            return (V) entry.data[(int) (key & MASK)];
        }

        @Override
        public boolean containsKey(long key) {
            final Entry entry = getEntryByIndex(getEntryIndex(key));
            return entry != null && entry.data[(int) (key & MASK)] != null;
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utils/src/main/java/jetbrains/exodus/core/dataStructures/persistent/PersistentBitTreeLongMap.java [169:188]:
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            if (root == null) {
                return null;
            }
            return root.getByWeight(index);
        }

        @SuppressWarnings("unchecked")
        @Override
        public V get(long key) {
            final Entry entry = getEntryByIndex(getEntryIndex(key));
            if (entry == null) {
                return null;
            }
            return (V) entry.data[(int) (key & MASK)];
        }

        @Override
        public boolean containsKey(long key) {
            final Entry entry = getEntryByIndex(getEntryIndex(key));
            return entry != null && entry.data[(int) (key & MASK)] != null;
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