import java.util.ArrayList;
import java.util.Arrays;
-import org.simantics.acorn.InvalidHeadStateException;
+import org.simantics.acorn.exception.InvalidHeadStateException;
+/**
+ * @deprecated exists only for backwards compatibility
+ */
+@Deprecated
public class HeadState implements Serializable {
private static final long serialVersionUID = -4135031566499790077L;