Github user FSchumacher commented on a diff in the pull request:
https://github.com/apache/jmeter/pull/300#discussion_r130235928
--- Diff: src/core/org/apache/jmeter/gui/TreeState.java ---
@@ -0,0 +1,84 @@
+package org.apache.jmeter.gui;
+
+import java.util.ArrayList;
+import java.util.List;
+import javax.swing.JTree;
+
+public interface TreeState {
+
+ /**
+ * Restore tree expanded and selected state
+ *
+ * @param guiInstance GuiPackage to be used
+ */
+ void restore(GuiPackage guiInstance);
+
+ final static TreeState NOTHING = new TreeState() {
--- End diff --
`static final` to conform with java conventions and the anonymous class
implementing `NOTHING` could be rewritten as a lambda function.
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