diff --git a/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h b/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
index 7e3bf3f..e91f076 100644
--- a/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
+++ b/native/jni/src/suggest/core/policy/dictionary_structure_with_buffer_policy.h
@@ -20,14 +20,12 @@
 #include <memory>
 
 #include "defines.h"
-#include "suggest/core/dictionary/binary_dictionary_bigrams_iterator.h"
 #include "suggest/core/dictionary/property/word_property.h"
 
 namespace latinime {
 
 class DicNode;
 class DicNodeVector;
-class DictionaryBigramsStructurePolicy;
 class DictionaryHeaderStructurePolicy;
 class DictionaryShortcutsStructurePolicy;
 class NgramListener;
@@ -67,8 +65,6 @@
 
     virtual int getShortcutPositionOfPtNode(const int nodePos) const = 0;
 
-    virtual BinaryDictionaryBigramsIterator getBigramsIteratorOfPtNode(const int nodePos) const = 0;
-
     virtual const DictionaryHeaderStructurePolicy *getHeaderStructurePolicy() const = 0;
 
     virtual const DictionaryShortcutsStructurePolicy *getShortcutsStructurePolicy() const = 0;
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp
index 994c425..baa0c0c 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.cpp
@@ -142,8 +142,8 @@
         return NOT_A_PROBABILITY;
     }
     if (prevWordsPtNodePos) {
-        BinaryDictionaryBigramsIterator bigramsIt =
-                getBigramsIteratorOfPtNode(prevWordsPtNodePos[0]);
+        const int bigramsPosition = getBigramsPositionOfPtNode(prevWordsPtNodePos[0]);
+        BinaryDictionaryBigramsIterator bigramsIt(&mBigramPolicy, bigramsPosition);
         while (bigramsIt.hasNext()) {
             bigramsIt.next();
             if (bigramsIt.getBigramPos() == ptNodePos
@@ -161,7 +161,8 @@
     if (!prevWordsPtNodePos) {
         return;
     }
-    BinaryDictionaryBigramsIterator bigramsIt = getBigramsIteratorOfPtNode(prevWordsPtNodePos[0]);
+    const int bigramsPosition = getBigramsPositionOfPtNode(prevWordsPtNodePos[0]);
+    BinaryDictionaryBigramsIterator bigramsIt(&mBigramPolicy, bigramsPosition);
     while (bigramsIt.hasNext()) {
         bigramsIt.next();
         listener->onVisitEntry(bigramsIt.getProbability(), bigramsIt.getBigramPos());
@@ -180,12 +181,6 @@
             ptNodeParams.getTerminalId());
 }
 
-BinaryDictionaryBigramsIterator Ver4PatriciaTriePolicy::getBigramsIteratorOfPtNode(
-        const int ptNodePos) const {
-    const int bigramsPosition = getBigramsPositionOfPtNode(ptNodePos);
-    return BinaryDictionaryBigramsIterator(&mBigramPolicy, bigramsPosition);
-}
-
 int Ver4PatriciaTriePolicy::getBigramsPositionOfPtNode(const int ptNodePos) const {
     if (ptNodePos == NOT_A_DICT_POS) {
         return NOT_A_DICT_POS;
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h
index ff69de7..9e989b2 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/backward/v402/ver4_patricia_trie_policy.h
@@ -97,8 +97,6 @@
 
     int getShortcutPositionOfPtNode(const int ptNodePos) const;
 
-    BinaryDictionaryBigramsIterator getBigramsIteratorOfPtNode(const int ptNodePos) const;
-
     const DictionaryHeaderStructurePolicy *getHeaderStructurePolicy() const {
         return mHeaderPolicy;
     }
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_helper.h b/native/jni/src/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_helper.h
index 2e05bf3..b726258 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_helper.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/pt_common/dynamic_pt_reading_helper.h
@@ -26,7 +26,6 @@
 
 namespace latinime {
 
-class DictionaryBigramsStructurePolicy;
 class DictionaryShortcutsStructurePolicy;
 class PtNodeArrayReader;
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp
index 53415ae..ea32eb2 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.cpp
@@ -311,8 +311,8 @@
         return NOT_A_PROBABILITY;
     }
     if (prevWordsPtNodePos) {
-        BinaryDictionaryBigramsIterator bigramsIt =
-                getBigramsIteratorOfPtNode(prevWordsPtNodePos[0]);
+        const int bigramsPosition = getBigramsPositionOfPtNode(prevWordsPtNodePos[0]);
+        BinaryDictionaryBigramsIterator bigramsIt(&mBigramListPolicy, bigramsPosition);
         while (bigramsIt.hasNext()) {
             bigramsIt.next();
             if (bigramsIt.getBigramPos() == ptNodePos
@@ -330,7 +330,8 @@
     if (!prevWordsPtNodePos) {
         return;
     }
-    BinaryDictionaryBigramsIterator bigramsIt = getBigramsIteratorOfPtNode(prevWordsPtNodePos[0]);
+    const int bigramsPosition = getBigramsPositionOfPtNode(prevWordsPtNodePos[0]);
+    BinaryDictionaryBigramsIterator bigramsIt(&mBigramListPolicy, bigramsPosition);
     while (bigramsIt.hasNext()) {
         bigramsIt.next();
         listener->onVisitEntry(bigramsIt.getProbability(), bigramsIt.getBigramPos());
@@ -344,12 +345,6 @@
     return mPtNodeReader.fetchPtNodeParamsInBufferFromPtNodePos(ptNodePos).getShortcutPos();
 }
 
-BinaryDictionaryBigramsIterator PatriciaTriePolicy::getBigramsIteratorOfPtNode(
-        const int ptNodePos) const {
-    const int bigramsPosition = getBigramsPositionOfPtNode(ptNodePos);
-    return BinaryDictionaryBigramsIterator(&mBigramListPolicy, bigramsPosition);
-}
-
 int PatriciaTriePolicy::getBigramsPositionOfPtNode(const int ptNodePos) const {
     if (ptNodePos == NOT_A_DICT_POS) {
         return NOT_A_DICT_POS;
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h
index 07cb72b..18a62a9 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v2/patricia_trie_policy.h
@@ -70,8 +70,6 @@
 
     int getShortcutPositionOfPtNode(const int ptNodePos) const;
 
-    BinaryDictionaryBigramsIterator getBigramsIteratorOfPtNode(const int ptNodePos) const;
-
     const DictionaryHeaderStructurePolicy *getHeaderStructurePolicy() const {
         return &mHeaderPolicy;
     }
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp
index 22f7e11..4bf8050 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.cpp
@@ -132,8 +132,8 @@
         return NOT_A_PROBABILITY;
     }
     if (prevWordsPtNodePos) {
-        BinaryDictionaryBigramsIterator bigramsIt =
-                getBigramsIteratorOfPtNode(prevWordsPtNodePos[0]);
+        const int bigramsPosition = getBigramsPositionOfPtNode(prevWordsPtNodePos[0]);
+        BinaryDictionaryBigramsIterator bigramsIt(&mBigramPolicy, bigramsPosition);
         while (bigramsIt.hasNext()) {
             bigramsIt.next();
             if (bigramsIt.getBigramPos() == ptNodePos
@@ -151,7 +151,8 @@
     if (!prevWordsPtNodePos) {
         return;
     }
-    BinaryDictionaryBigramsIterator bigramsIt = getBigramsIteratorOfPtNode(prevWordsPtNodePos[0]);
+    const int bigramsPosition = getBigramsPositionOfPtNode(prevWordsPtNodePos[0]);
+    BinaryDictionaryBigramsIterator bigramsIt(&mBigramPolicy, bigramsPosition);
     while (bigramsIt.hasNext()) {
         bigramsIt.next();
         listener->onVisitEntry(bigramsIt.getProbability(), bigramsIt.getBigramPos());
@@ -170,12 +171,6 @@
             ptNodeParams.getTerminalId());
 }
 
-BinaryDictionaryBigramsIterator Ver4PatriciaTriePolicy::getBigramsIteratorOfPtNode(
-        const int ptNodePos) const {
-    const int bigramsPosition = getBigramsPositionOfPtNode(ptNodePos);
-    return BinaryDictionaryBigramsIterator(&mBigramPolicy, bigramsPosition);
-}
-
 int Ver4PatriciaTriePolicy::getBigramsPositionOfPtNode(const int ptNodePos) const {
     if (ptNodePos == NOT_A_DICT_POS) {
         return NOT_A_DICT_POS;
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h
index c5b6a80..76b3404 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/ver4_patricia_trie_policy.h
@@ -79,8 +79,6 @@
 
     int getShortcutPositionOfPtNode(const int ptNodePos) const;
 
-    BinaryDictionaryBigramsIterator getBigramsIteratorOfPtNode(const int ptNodePos) const;
-
     const DictionaryHeaderStructurePolicy *getHeaderStructurePolicy() const {
         return mHeaderPolicy;
     }