New maze

Normand Briere

2019-11-21 ddb10cb84dddfeef1ef9946f2e13cef3c93e6cc4

 Box.java
..
..
@@ -1,6 +1,7 @@
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 public class Box extends Object3D implements java.io.Serializable
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 {
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-    static final long serialVersionUID = -8881546880864755550L; // 0;
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+    static final long serialVersionUID = //-8881546880864755550L; // old
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+                                        0; // new 2019
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     boolean open;
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