count Matching IDs
inline fun <ID : Any> Field<ID, *>.countMatchingIDs(reductionType: ReductionType = ExcludingSelf, crossinline predicate: Predicate<ID>): Int
Counts the number of field IDs that satisfy the given predicate.
By default, the local ID is excluded from the count. It is included only if reductionType is IncludingSelf.
Return
the number of IDs that satisfy the predicate.
Parameters
reduction Type
specifies whether to include the local ID in the count (default is ExcludingSelf).
predicate
the condition to evaluate for each ID.