core/src/main/java/org/apache/commons/functor/core/composite/BinaryCompositeBinaryFunction.java [135:148]:
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            hash <<= HASH_SHIFT;
            hash ^= helper.f.hashCode();
            hash <<= HASH_SHIFT;
            hash ^= helper.g.hashCode();
            hash <<= HASH_SHIFT;
            hash ^= helper.h.hashCode();
        return hash;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String toString() {
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core/src/main/java/org/apache/commons/functor/core/composite/CompositeBinaryFunction.java [139:152]:
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        hash <<= HASH_SHIFT;
        hash ^= helper.f.hashCode();
        hash <<= HASH_SHIFT;
        hash ^= helper.g.hashCode();
        hash <<= HASH_SHIFT;
        hash ^= helper.h.hashCode();
        return hash;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String toString() {
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