aaaaa

app/src/main/java/sudoku/structure/StateManager.java

@@ -25,6 +25,10 @@ public class StateManager {
 		this.doku = doku;
 	}
 
+	public void forgetState() {
+		states.pop();
+	}
+
 	public Map<Cell, Integer> pushState() {
 		states.add(saveState());
 		return states.getLast();
@@ -42,7 +46,7 @@ public class StateManager {
 		return currentState;
 	}
 
-	private void restoreState(Map<Cell, Integer> state) {
+	public void restoreState(Map<Cell, Integer> state) {
 		for (var entry : state.entrySet()) {
 			entry.getKey().setSymbolIndex(entry.getValue());
 		}