private static Func <TItemToTest, bool> GetPredicate <TFilter, TItemToTest>(
this IFilterNode <TFilter> filterNode,
Func <TFilter, Func <TItemToTest, bool> > itemPredicate)
=> filterNode.Aggregate(
Combine,
Invert,
leafFilterNode => itemPredicate(leafFilterNode.Filter));
// TODO: Maybe this can be made private/internal?
public static Func <TItemToTest, bool> GetPredicate <TLeafNode, TItemToTest>(
this IFilterNode <TLeafNode> filter,
Func <TLeafNode, Func <TItemToTest, bool> > itemPredicate)
where TLeafNode : class, ILeafFilterNode
{
return(filter.Aggregate(
Combine,
Invert,
itemPredicate));
}