func NewFilter(numTrees int64, tree int64) Filter {
	return func(k []byte) bool {
		if pathToTree(k, numTrees) == uint64(tree) {
			return true
		}
		return false
	}
}
func NewFilter(numTrees int64, tree int64) Filter {
	return func(k []byte) bool {
		if pathToTree(k, numTrees) == uint64(tree) {
			return true
		}
		return false
	}
}
func NewFilter ( numTrees int64 , tree int64 ) Filter { return func ( k [ ] byte ) bool { if pathToTree ( k , numTrees ) == uint64 ( tree ) { return true } return false } }
// NewFilter creates a filter for a hashtree shard.
NewFilter creates a filter for a hashtree shard .