Prevent onReady exceptions

+## [2.12.4]
+- Prevent exceptions on onReady with nullables
+
+## [2.12.3]
+- Fix List lenght == null 
+
 ## [2.12.2]
 - Fix Workers
 

@@ -361,12 +361,11 @@ class ListX<E> extends Iterable<E> implements RxInterface<E> {
     addAll(items);
   }
 
-  List<E> _value;
   List<E> get value {
     if (getObs != null) {
       getObs.addListener(subject.stream);
     }
-    return _value;
+    return _list;
   }
 
   String get string => value.toString();
@@ -381,8 +380,8 @@ class ListX<E> extends Iterable<E> implements RxInterface<E> {
   }
 
   set value(Iterable<E> val) {
-    if (_value == val) return;
-    _value = val;
+    if (_list == val) return;
+    _list = val;
     subject.add(null);
   }
 

@@ -41,7 +41,7 @@ abstract class DisposableInterface {
   /// Do not overwrite this method.
   void onStart() {
     onInit();
-    SchedulerBinding.instance.addPostFrameCallback((_) => onReady());
+    SchedulerBinding.instance?.addPostFrameCallback((_) => onReady());
   }
 
   /// Called Called immediately after the widget is allocated in memory.

 name: get
 description: Open screens/snackbars/dialogs/bottomSheets without context, manage states and inject dependencies easily with Get.
-version: 2.12.2
+version: 2.12.4
 homepage: https://github.com/jonataslaw/get
 
 environment: