diff --git a/src/org/ntlab/deltaViewer/CollaborationAliasCollector.java b/src/org/ntlab/deltaViewer/CollaborationAliasCollector.java
index 244adcd..9f22d79 100644
--- a/src/org/ntlab/deltaViewer/CollaborationAliasCollector.java
+++ b/src/org/ntlab/deltaViewer/CollaborationAliasCollector.java
@@ -19,7 +19,7 @@
 
 	public CollaborationAliasCollector(IAliasCollector dac) {
 		aliasList.addAll(dac.getAliasList());
-		aliasList = sort(aliasList);
+		aliasList = sortAliasListByTimeStamp(aliasList);
 	}
 	
 	/*
@@ -40,7 +40,7 @@
 	 */
 	public void merge(IAliasCollector other) {
 		List<Alias> otherAliasList = other.getAliasList();
-		otherAliasList = sort(otherAliasList);
+		otherAliasList = sortAliasListByTimeStamp(otherAliasList);
 		int otherIdx = 0; // Index of otherAliasList
 		int thisIdx = 0; // Index of thisAliasList
 		while(otherIdx < otherAliasList.size()) {
@@ -81,7 +81,7 @@
 	 * @param aliasList AliasList to sort.
 	 * @return Sorted AliasList.
 	 */
-	private List<Alias> sort(List<Alias> aliasList) {
+	private List<Alias> sortAliasListByTimeStamp(List<Alias> aliasList) {
 		List<Alias> cloneAliasList = new ArrayList<>(aliasList);
 		List<Alias> sortedAliasList = cloneAliasList.stream().sorted(new Comparator<Alias>() {
 	                @Override