chd_builder.go
func (b *CHDBuilder) Add(key []byte, value []byte) {
	b.keys = append(b.keys, key)
	b.values = append(b.values, value)
}
func (b *CHDBuilder) Add(key []byte, value []byte) {
	b.keys = append(b.keys, key)
	b.values = append(b.values, value)
}
// Add a key and value to the hash table.