[ONOS-3904] Derived data type and formatting fixes
Change-Id: I1d68899e0056fa0db6322e83f7e9d3ff9b3b1ee0
diff --git a/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java b/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java
index 08b1da7..20e086f 100644
--- a/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java
+++ b/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java
@@ -16,6 +16,8 @@
package org.onosproject.yangutils.parser.impl;
+import java.util.Stack;
+
import org.antlr.v4.runtime.ParserRuleContext;
import org.antlr.v4.runtime.tree.ErrorNode;
import org.antlr.v4.runtime.tree.TerminalNode;
@@ -57,8 +59,6 @@
import org.onosproject.yangutils.parser.impl.listeners.ValueListener;
import org.onosproject.yangutils.parser.impl.listeners.VersionListener;
-import java.util.Stack;
-
/**
* ANTLR generates a parse-tree listener interface that responds to events
* triggered by the built-in tree walker. The methods in listener are just