valueCount

The number of literal values carried by a multi-value filter node (IN, NOT_IN, CONTAINS_ALL, IDS, AGGREGATE_IDS: the operators whose value arity is a list), or null for nodes that do not carry a value list.

The number of literal values carried by this having node: one for CONDITION, two for BETWEEN, the list size for IN, and zero for IS_NULL and the logical AND / OR nodes.