src/main/java/org/apache/commons/collections4/bag/AbstractMapBag.java [337:385]:
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        if (other.size() != size()) {
            return false;
        }
        for (final E element : map.keySet()) {
            if (other.getCount(element) != getCount(element)) {
                return false;
            }
        }
        return true;
    }

    /**
     * Gets the number of occurrence of the given element in this bag by
     * looking up its count in the underlying map.
     *
     * @param object the object to search for
     * @return the number of occurrences of the object, zero if not found
     */
    @Override
    public int getCount(final Object object) {
        final MutableInteger count = map.get(object);
        if (count != null) {
            return count.value;
        }
        return 0;
    }

    /**
     * Utility method for implementations to access the map that backs this bag.
     * Not intended for interactive use outside of subclasses.
     *
     * @return the map being used by the Bag
     */
    protected Map<E, MutableInteger> getMap() {
        return map;
    }

    /**
     * Gets a hash code for the Bag compatible with the definition of equals.
     * The hash code is defined as the sum total of a hash code for each
     * element. The per element hash code is defined as
     * {@code (e==null ? 0 : e.hashCode()) ^ noOccurrences)}. This hash code
     * is compatible with the Set interface.
     *
     * @return the hash code of the Bag
     */
    @Override
    public int hashCode() {
        int total = 0;
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src/main/java/org/apache/commons/collections4/multiset/AbstractMapMultiSet.java [392:431]:
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        if (other.size() != size()) {
            return false;
        }
        for (final E element : map.keySet()) {
            if (other.getCount(element) != getCount(element)) {
                return false;
            }
        }
        return true;
    }

    /**
     * Gets the number of occurrence of the given element in this multiset by
     * looking up its count in the underlying map.
     *
     * @param object the object to search for
     * @return the number of occurrences of the object, zero if not found
     */
    @Override
    public int getCount(final Object object) {
        final MutableInteger count = map.get(object);
        if (count != null) {
            return count.value;
        }
        return 0;
    }

    /**
     * Gets the map that backs this multiset.
     * Not intended for interactive use outside of subclasses.
     *
     * @return the map being used by the MultiSet
     */
    protected Map<E, MutableInteger> getMap() {
        return map;
    }

    @Override
    public int hashCode() {
        int total = 0;
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