@Override
    default NullStrategy nullStrategy() {
        return NullStrategy.THROW_EXCEPTION;
    }
Specialization of {@link NonNullableExpression} that throws an exception if
the wrapped expression returns {@code null}.

@param <T>     the input entity type
@param <INNER> the wrapped nullable expression

@author Emil Forslund
@since  3.1.0
runtime-parent/runtime-compute/src/main/java/com/speedment/runtime/compute/expression/orelse/OrElseThrowExpression.java