// Path: src/chap6/Environment.java
// public interface Environment {
//     void put(String name, Object value);
//     Object get(String name);
// }
// 
// Path: src/chap7/FuncEvaluator.java
// @Reviser public static interface EnvEx extends Environment {
//     void putNew(String name, Object value);
//     Environment where(String name);
//     void setOuter(Environment e);
// }


import chap6.Environment;
import chap7.FuncEvaluator.EnvEx;
package chap9;

public class StoneObject {
    public static class AccessException extends Exception {}
// Path: src/chap6/Environment.java
// public interface Environment {
//     void put(String name, Object value);
//     Object get(String name);
// }
// 
// Path: src/chap7/FuncEvaluator.java
// @Reviser public static interface EnvEx extends Environment {
//     void putNew(String name, Object value);
//     Environment where(String name);
//     void setOuter(Environment e);
// }


// Path: src/chap9/StoneObject.java
import chap6.Environment;
import chap7.FuncEvaluator.EnvEx;

package chap9;

public class StoneObject {
    public static class AccessException extends Exception {}
    protected Environment env;