commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/linear/OpenIntToDoubleHashMap.java [550:571]:
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        public void advance()
            throws ConcurrentModificationException, NoSuchElementException {

            if (referenceCount != count) {
                throw new ConcurrentModificationException();
            }

            // advance on step
            current = next;

            // prepare next step
            try {
                do {
                    ++next;
                } while (states[next] != FULL);
            } catch (ArrayIndexOutOfBoundsException e) {
                next = -2;
                if (current < 0) {
                    throw new NoSuchElementException();
                }
            }
        }
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commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/linear/OpenIntToFieldHashMap.java [562:583]:
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        public void advance()
            throws ConcurrentModificationException, NoSuchElementException {

            if (referenceCount != count) {
                throw new ConcurrentModificationException();
            }

            // advance on step
            current = next;

            // prepare next step
            try {
                do {
                    ++next;
                } while (states[next] != FULL);
            } catch (ArrayIndexOutOfBoundsException e) {
                next = -2;
                if (current < 0) {
                    throw new NoSuchElementException();
                }
            }
        }
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