/**
* Utility usable by subclasses when they want to get basic String sorting using common checks.
*
* @see SchemaField#checkSortability
*/
protected SortField getStringSort(SchemaField field, boolean reverse) {
field.checkSortability();
return Sorting.getStringSortField(
field.name, reverse, field.sortMissingLast(), field.sortMissingFirst());
}