diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index 1e31c96..8a6404b 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -113,11 +113,8 @@
         synchronized(mDicTraverseSessions) {
             DicTraverseSession traverseSession = mDicTraverseSessions.get(traverseSessionId);
             if (traverseSession == null) {
-                traverseSession = mDicTraverseSessions.get(traverseSessionId);
-                if (traverseSession == null) {
-                    traverseSession = new DicTraverseSession(mLocale, mNativeDict, mDictSize);
-                    mDicTraverseSessions.put(traverseSessionId, traverseSession);
-                }
+                traverseSession = new DicTraverseSession(mLocale, mNativeDict, mDictSize);
+                mDicTraverseSessions.put(traverseSessionId, traverseSession);
             }
             return traverseSession;
         }
@@ -266,20 +263,10 @@
                 new FormatSpec.FormatOptions(outFormatVersion[0], hasHistoricalInfo));
     }
 
-
     @Override
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
-        return getSuggestionsWithSessionId(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, 0 /* sessionId */, inOutLanguageWeight);
-    }
-
-    @Override
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
             final int sessionId, final float[] inOutLanguageWeight) {
         if (!isValidDictionary()) {
             return null;
diff --git a/java/src/com/android/inputmethod/latin/Dictionary.java b/java/src/com/android/inputmethod/latin/Dictionary.java
index cd380db..5253cc3 100644
--- a/java/src/com/android/inputmethod/latin/Dictionary.java
+++ b/java/src/com/android/inputmethod/latin/Dictionary.java
@@ -73,6 +73,7 @@
      * @param proximityInfo the object for key proximity. May be ignored by some implementations.
      * @param blockOffensiveWords whether to block potentially offensive words
      * @param additionalFeaturesOptions options about additional features used for the suggestion.
+     * @param sessionId the session id.
      * @param inOutLanguageWeight the language weight used for generating suggestions.
      * inOutLanguageWeight is a float array that has only one element. This can be updated when the
      * different language weight is used.
@@ -83,17 +84,7 @@
     abstract public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight);
-
-    // The default implementation of this method ignores sessionId.
-    // Subclasses that want to use sessionId need to override this method.
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final int sessionId, final float[] inOutLanguageWeight) {
-        return getSuggestions(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, inOutLanguageWeight);
-    }
+            final int sessionId, final float[] inOutLanguageWeight);
 
     /**
      * Checks if the given word occurs in the dictionary
@@ -167,7 +158,7 @@
         public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
                 final String prevWord, final ProximityInfo proximityInfo,
                 final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-                final float[] inOutLanguageWeight) {
+                final int sessionId, final float[] inOutLanguageWeight) {
             return null;
         }
 
diff --git a/java/src/com/android/inputmethod/latin/DictionaryCollection.java b/java/src/com/android/inputmethod/latin/DictionaryCollection.java
index 16173ff..239fd06 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryCollection.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryCollection.java
@@ -59,20 +59,20 @@
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
+            final int sessionId, final float[] inOutLanguageWeight) {
         final CopyOnWriteArrayList<Dictionary> dictionaries = mDictionaries;
         if (dictionaries.isEmpty()) return null;
         // To avoid creating unnecessary objects, we get the list out of the first
         // dictionary and add the rest to it if not null, hence the get(0)
         ArrayList<SuggestedWordInfo> suggestions = dictionaries.get(0).getSuggestions(composer,
                 prevWord, proximityInfo, blockOffensiveWords, additionalFeaturesOptions,
-                inOutLanguageWeight);
+                sessionId, inOutLanguageWeight);
         if (null == suggestions) suggestions = CollectionUtils.newArrayList();
         final int length = dictionaries.size();
         for (int i = 1; i < length; ++ i) {
             final ArrayList<SuggestedWordInfo> sugg = dictionaries.get(i).getSuggestions(composer,
                     prevWord, proximityInfo, blockOffensiveWords, additionalFeaturesOptions,
-                    inOutLanguageWeight);
+                    sessionId, inOutLanguageWeight);
             if (null != sugg) suggestions.addAll(sugg);
         }
         return suggestions;
diff --git a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
index e0220e1..ddbb196 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorForSuggest.java
@@ -455,7 +455,7 @@
             final Dictionary dictionary = dictionaries.getDict(dictType);
             if (null == dictionary) continue;
             final ArrayList<SuggestedWordInfo> dictionarySuggestions =
-                    dictionary.getSuggestionsWithSessionId(composer, prevWord, proximityInfo,
+                    dictionary.getSuggestions(composer, prevWord, proximityInfo,
                             blockOffensiveWords, additionalFeaturesOptions, sessionId,
                             languageWeight);
             if (null == dictionarySuggestions) continue;
diff --git a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
index e323f0a..4358f84 100644
--- a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
@@ -366,7 +366,7 @@
     }
 
     @Override
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
+    public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
             final int sessionId, final float[] inOutLanguageWeight) {
@@ -380,9 +380,9 @@
                     return null;
                 }
                 final ArrayList<SuggestedWordInfo> suggestions =
-                        mBinaryDictionary.getSuggestionsWithSessionId(composer, prevWord,
-                                proximityInfo, blockOffensiveWords, additionalFeaturesOptions,
-                                sessionId, inOutLanguageWeight);
+                        mBinaryDictionary.getSuggestions(composer, prevWord, proximityInfo,
+                                blockOffensiveWords, additionalFeaturesOptions, sessionId,
+                                inOutLanguageWeight);
                 if (mBinaryDictionary.isCorrupted()) {
                     Log.i(TAG, "Dictionary (" + mDictName +") is corrupted. "
                             + "Remove and regenerate it.");
@@ -401,15 +401,6 @@
     }
 
     @Override
-    public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
-        return getSuggestionsWithSessionId(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, 0 /* sessionId */, inOutLanguageWeight);
-    }
-
-    @Override
     public boolean isValidWord(final String word) {
         reloadDictionaryIfRequired();
         boolean lockAcquired = false;
diff --git a/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java
index 9f61d6c..15b1238 100644
--- a/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ReadOnlyBinaryDictionary.java
@@ -52,20 +52,12 @@
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
             final String prevWord, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
-        return getSuggestionsWithSessionId(composer, prevWord, proximityInfo, blockOffensiveWords,
-                additionalFeaturesOptions, 0 /* sessionId */, inOutLanguageWeight);
-    }
-
-    @Override
-    public ArrayList<SuggestedWordInfo> getSuggestionsWithSessionId(final WordComposer composer,
-            final String prevWord, final ProximityInfo proximityInfo,
-            final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
             final int sessionId, final float[] inOutLanguageWeight) {
         if (mLock.readLock().tryLock()) {
             try {
                 return mBinaryDictionary.getSuggestions(composer, prevWord, proximityInfo,
-                        blockOffensiveWords, additionalFeaturesOptions, inOutLanguageWeight);
+                        blockOffensiveWords, additionalFeaturesOptions, sessionId,
+                        inOutLanguageWeight);
             } finally {
                 mLock.readLock().unlock();
             }
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
index 69d0927..4c23d22 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
@@ -327,7 +327,7 @@
                 final ArrayList<SuggestedWordInfo> suggestions =
                         dictInfo.mDictionary.getSuggestions(composer, prevWord,
                                 dictInfo.getProximityInfo(), true /* blockOffensiveWords */,
-                                null /* additionalFeaturesOptions */,
+                                null /* additionalFeaturesOptions */, 0 /* sessionId */,
                                 null /* inOutLanguageWeight */);
                 if (suggestions != null) {
                     for (final SuggestedWordInfo suggestion : suggestions) {
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java b/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java
index c992643..0be2568 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/DictionaryPool.java
@@ -54,7 +54,7 @@
                 public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer composer,
                         final String prevWord, final ProximityInfo proximityInfo,
                         final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-                        final float[] inOutLanguageWeight) {
+                        final int sessionId, final float[] inOutLanguageWeight) {
                     return noSuggestions;
                 }
                 @Override
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java
index a694bf4..5f6e168 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedContactsBinaryDictionary.java
@@ -38,10 +38,10 @@
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer codes,
             final String prevWordForBigrams, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
+            final int sessionId, final float[] inOutLanguageWeight) {
         synchronized (mLock) {
             return super.getSuggestions(codes, prevWordForBigrams, proximityInfo,
-                    blockOffensiveWords, additionalFeaturesOptions, inOutLanguageWeight);
+                    blockOffensiveWords, additionalFeaturesOptions, sessionId, inOutLanguageWeight);
         }
     }
 
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java
index 1a6dd58..0499ad2 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java
@@ -43,10 +43,10 @@
     public ArrayList<SuggestedWordInfo> getSuggestions(final WordComposer codes,
             final String prevWordForBigrams, final ProximityInfo proximityInfo,
             final boolean blockOffensiveWords, final int[] additionalFeaturesOptions,
-            final float[] inOutLanguageWeight) {
+            final int sessionId, final float[] inOutLanguageWeight) {
         synchronized (mLock) {
             return super.getSuggestions(codes, prevWordForBigrams, proximityInfo,
-                    blockOffensiveWords, additionalFeaturesOptions, inOutLanguageWeight);
+                    blockOffensiveWords, additionalFeaturesOptions, sessionId, inOutLanguageWeight);
         }
     }