protected ClickHouseEnumValue set(boolean isNull, int value) {
        this.isNull = isNull;
        this.value = isNull ? 0 : type.validate(value);
        return this;
    }
Update value of the given object or create a new instance if {@code ref} is
null.

@param ref   object to update, could be null
@param type  enum type, null is same as {@link ClickHouseEnum#EMPTY}
@param value value
@return same object as {@code ref} or a new instance if it's null
clickhouse-data/src/main/java/com/clickhouse/data/value/ClickHouseEnumValue.java