KeyValueStore (io-hotmoka-patricia 1.0.11 API)

```
public interface KeyValueStore
```
An abstraction of a store that persists the nodes of a Patricia tree.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`byte[]`	`get(byte[] key)`	Gets the association of a key in this store.
`byte[]`	`getRoot()`	Yields the hash of the root of the Patricia trie that this store supports.
`void`	`put(byte[] key, byte[] value)`	Persists an association of a key to a value in this store.
`void`	`remove(byte[] key)`	Deletes the association for the given key, that must exist in store.
`void`	`setRoot(byte[] root)`	Sets the hash of the root of the Patricia trie that this store supports.

- Method Detail
  - getRoot
```
byte[] getRoot()
```
    Yields the hash of the root of the Patricia trie that this store supports.
    
    Returns:
    
    the hash of the root; this might be null if this store supports the empty Patricia trie
  - setRoot
```
void setRoot(byte[] root)
```
    Sets the hash of the root of the Patricia trie that this store supports.
    
    Parameters:
    
    root - the hash of the root of the trie
  - put
```
void put(byte[] key,
         byte[] value)
```
    Persists an association of a key to a value in this store. It replaces it if it was already present.
    
    Parameters:
    
    key - the key
    
    value - the value
  - remove
```
void remove(byte[] key)
```
    Deletes the association for the given key, that must exist in store.
    
    Parameters:
    
    key - the key
  - get
```
byte[] get(byte[] key)
    throws NoSuchElementException
```
    Gets the association of a key in this store.
    
    Parameters:
    
    key - the key
    
    Returns:
    
    the value associated with the key
    
    Throws:
    
    NoSuchElementException - if the key is not associated in this store