Put redundant code in parent viewmodel

app/src/main/java/awais/instagrabber/fragments/main/viewmodels/BasePostViewModel.java

@@ -1,9 +1,19 @@
 package awais.instagrabber.fragments.main.viewmodels;
 
+import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
 
+import java.util.List;
+
 import awais.instagrabber.models.BasePostModel;
 
 public class BasePostViewModel<T extends BasePostModel> extends ViewModel {
+    private MutableLiveData<List<T>> list;
 
+    public MutableLiveData<List<T>> getList() {
+        if (list == null) {
+            list = new MutableLiveData<>();
+        }
+        return list;
+    }
 }

app/src/main/java/awais/instagrabber/fragments/main/viewmodels/DiscoverItemViewModel.java

@@ -1,18 +1,7 @@
 package awais.instagrabber.fragments.main.viewmodels;
 
-import androidx.lifecycle.MutableLiveData;
-
-import java.util.List;
-
 import awais.instagrabber.models.DiscoverItemModel;
 
 public class DiscoverItemViewModel extends BasePostViewModel<DiscoverItemModel> {
-    private MutableLiveData<List<DiscoverItemModel>> list;
 
-    public MutableLiveData<List<DiscoverItemModel>> getList() {
-        if (list == null) {
-            list = new MutableLiveData<>();
-        }
-        return list;
-    }
 }

app/src/main/java/awais/instagrabber/fragments/main/viewmodels/FeedViewModel.java

@@ -1,19 +1,7 @@
 package awais.instagrabber.fragments.main.viewmodels;
 
-import androidx.lifecycle.MutableLiveData;
-
-import java.util.Collections;
-import java.util.List;
-
 import awais.instagrabber.models.FeedModel;
 
 public class FeedViewModel extends BasePostViewModel<FeedModel> {
-    private MutableLiveData<List<FeedModel>> list;
 
-    public MutableLiveData<List<FeedModel>> getList() {
-        if (list == null) {
-            list = new MutableLiveData<>(Collections.emptyList());
-        }
-        return list;
-    }
 }

app/src/main/java/awais/instagrabber/fragments/main/viewmodels/PostsViewModel.java

@@ -1,18 +1,7 @@
 package awais.instagrabber.fragments.main.viewmodels;
 
-import androidx.lifecycle.MutableLiveData;
-
-import java.util.List;
-
 import awais.instagrabber.models.PostModel;
 
 public class PostsViewModel extends BasePostViewModel<PostModel> {
-    private MutableLiveData<List<PostModel>> list;
 
-    public MutableLiveData<List<PostModel>> getList() {
-        if (list == null) {
-            list = new MutableLiveData<>();
-        }
-        return list;
-    }
 }