@Override
    public Ordering getOrdering() {
        // Alphabetic order and numeric order might differ
        return Ordering.UNSPECIFIED;
    }
Maps between a large integer stored as a {@code String} into a java
{@link java.math.BigInteger}.

@author Emil Forslund
@since  3.0.23
runtime-parent/runtime-typemapper/src/main/java/com/speedment/runtime/typemapper/string/StringToBigIntegerMapper.java