Decides whether result will include also the primary label elements or only requested label ones. It changes also the cardinality of result.
If true, returned label values are in cardinality of primary label, i.e., result could contain duplicated values.
If false, returned label values are unique values and smaller amount of label values can be returned than the number of primary label values.
This is used mainly in filters to not display duplicate values where each of them filter out the same records from an insight when text value attribute filters are used.
The value is applied only on backends without the supportsElementUris capability.