not<T> function
Used in the whereValues
of DBAccess.loadBy, DBAccess.queryBy,
and sqlWhereBy to indicate a field shall not be the given value,
so-called negative condition.
Example,
await access.queryBy(..., {"removedAt": notNull, "type": not(1)});
Implementation
NotCondition<T> not<T>(T value) => NotCondition<T>(value);