@Override
        public final Operator operator() {
            return Operator.SQRT;
        }
Abstract base implementation of a {@link UnaryExpression} for a
square root-operation.

@param <T>      the input entity type
@param <INNER>  the inner expression type to take the square root of
runtime-parent/runtime-compute/src/main/java/com/speedment/runtime/compute/internal/expression/SqrtUtil.java