import FileMonitor from './FileMonitor';
import {
  BaseFileState,
  ContentHashState,
  LastModifiedState,
  SizeState,
  SmartState,
} from './states';

export {
  FileMonitor,
  BaseFileState,
  ContentHashState,
  LastModifiedState,
  SizeState,
  SmartState
};

import FileMonitor from './FileMonitor';
import {
  BaseFileState,
  CombinedState
} from './states';

export {
  FileMonitor,
  BaseFileState,
  CombinedState
};

--- 
+++ 
@@ -1,11 +1,17 @@
 import FileMonitor from './FileMonitor';
 import {
   BaseFileState,
-  CombinedState
+  ContentHashState,
+  LastModifiedState,
+  SizeState,
+  SmartState,
 } from './states';
 
 export {
   FileMonitor,
   BaseFileState,
-  CombinedState
+  ContentHashState,
+  LastModifiedState,
+  SizeState,
+  SmartState
 };
Add export statement for all states

