@Override
        public final SECOND second() {
            return secondInner;
        }
Abstract base for a minus operation.

@param <T>       the input type
@param <FIRST>   the first operand expression type
@param <SECOND>  the second operand expression type
runtime-parent/runtime-compute/src/main/java/com/speedment/runtime/compute/internal/expression/MinusUtil.java