trie.go
func (p *prefixTrie) String() string {
	children := []string{}
	padding := strings.Repeat("| ", p.level()+1)
	for bits, child := range p.children {
		if child == nil {
			continue
		}
		childStr := fmt.Sprintf("\n%s%d--> %s", padding, bits, child.String())
		children = append(children, childStr)
	}
	return fmt.Sprintf("%s (target_pos:%d:has_entry:%t)%s", p.network,
		p.targetBitPosition(), p.hasEntry(), strings.Join(children, ""))
}
func (p *prefixTrie) String() string {
	children := []string{}
	padding := strings.Repeat("| ", p.level()+1)
	for bits, child := range p.children {
		if child == nil {
			continue
		}
		childStr := fmt.Sprintf("\n%s%d--> %s", padding, bits, child.String())
		children = append(children, childStr)
	}
	return fmt.Sprintf("%s (target_pos:%d:has_entry:%t)%s", p.network,
		p.targetBitPosition(), p.hasEntry(), strings.Join(children, ""))
}
// String returns string representation of trie, mainly for visualization and
// debugging.