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-rw-r--r--chapter09/src/main/java/com/seaofnodes/simple/node/ConstantNode.java2
1 files changed, 1 insertions, 1 deletions
diff --git a/chapter09/src/main/java/com/seaofnodes/simple/node/ConstantNode.java b/chapter09/src/main/java/com/seaofnodes/simple/node/ConstantNode.java
index 9e45198c..2012a30a 100644
--- a/chapter09/src/main/java/com/seaofnodes/simple/node/ConstantNode.java
+++ b/chapter09/src/main/java/com/seaofnodes/simple/node/ConstantNode.java
@@ -18,7 +18,7 @@ import java.util.BitSet;
* The Constant's value is the value stored in it.
*/
public class ConstantNode extends Node {
- Type _con;
+ final Type _con;
public ConstantNode( Type type ) {
super(Parser.START);
_con = type;