diff --git a/RETableViewManager/RETableViewManager.h b/RETableViewManager/RETableViewManager.h
index c4f9912..5e64e0e 100644
--- a/RETableViewManager/RETableViewManager.h
+++ b/RETableViewManager/RETableViewManager.h
@@ -48,11 +48,23 @@
 
 @protocol RETableViewManagerDelegate;
 
-/**
- Returns device OS major version.
- */
-NSUInteger REDeviceSystemMajorVersion();
-BOOL REDeviceIsUIKit7();
+static BOOL REDeviceIsUIKit7()
+{
+    static BOOL isUIKitFlatMode = NO;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
+            // If your app is running in legacy mode, tintColor will be nil - else it must be set to some color.
+            if (UIApplication.sharedApplication.keyWindow) {
+                isUIKitFlatMode = [UIApplication.sharedApplication.delegate.window performSelector:@selector(tintColor)] != nil;
+            } else {
+                // Possible that we're called early on (e.g. when used in a Storyboard). Adapt and use a temporary window.
+                isUIKitFlatMode = [[UIWindow new] performSelector:@selector(tintColor)] != nil;
+            }
+        }
+    });
+    return isUIKitFlatMode;
+}
 
 /**
  `RETableViewManager` allows to manage the content of any `UITableView` with ease, both forms and lists. `RETableViewManager` is built on top of reusable cells technique and provides 
diff --git a/RETableViewManager/RETableViewManager.m b/RETableViewManager/RETableViewManager.m
index 38c6557..eefc4b1 100755
--- a/RETableViewManager/RETableViewManager.m
+++ b/RETableViewManager/RETableViewManager.m
@@ -25,23 +25,6 @@
 
 #import "RETableViewManager.h"
 
-BOOL REDeviceIsUIKit7() {
-    static BOOL isUIKitFlatMode = NO;
-    static dispatch_once_t onceToken;
-    dispatch_once(&onceToken, ^{
-        if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_6_1) {
-            // If your app is running in legacy mode, tintColor will be nil - else it must be set to some color.
-            if (UIApplication.sharedApplication.keyWindow) {
-                isUIKitFlatMode = [UIApplication.sharedApplication.delegate.window performSelector:@selector(tintColor)] != nil;
-            } else {
-                // Possible that we're called early on (e.g. when used in a Storyboard). Adapt and use a temporary window.
-                isUIKitFlatMode = [[UIWindow new] performSelector:@selector(tintColor)] != nil;
-            }
-        }
-    });
-    return isUIKitFlatMode;
-}
-
 @interface RETableViewManager ()
 
 /**
diff --git a/RETableViewManagerExample/RETableViewManagerExample.xcworkspace/xcshareddata/RETableViewManagerExample.xccheckout b/RETableViewManagerExample/RETableViewManagerExample.xcworkspace/xcshareddata/RETableViewManagerExample.xccheckout
deleted file mode 100644
index 54c3f43..0000000
--- a/RETableViewManagerExample/RETableViewManagerExample.xcworkspace/xcshareddata/RETableViewManagerExample.xccheckout
+++ /dev/null
@@ -1,41 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>IDESourceControlProjectFavoriteDictionaryKey</key>
-	<false/>
-	<key>IDESourceControlProjectIdentifier</key>
-	<string>8477F0B3-7B50-4DEE-9405-A3B6471912C9</string>
-	<key>IDESourceControlProjectName</key>
-	<string>RETableViewManagerExample</string>
-	<key>IDESourceControlProjectOriginsDictionary</key>
-	<dict>
-		<key>00213686-1ACC-46C9-9B90-2769BCA1244F</key>
-		<string>ssh://github.com/romaonthego/RETableViewManager.git</string>
-	</dict>
-	<key>IDESourceControlProjectPath</key>
-	<string>RETableViewManagerExample/RETableViewManagerExample.xcworkspace</string>
-	<key>IDESourceControlProjectRelativeInstallPathDictionary</key>
-	<dict>
-		<key>00213686-1ACC-46C9-9B90-2769BCA1244F</key>
-		<string>../..</string>
-	</dict>
-	<key>IDESourceControlProjectURL</key>
-	<string>ssh://github.com/romaonthego/RETableViewManager.git</string>
-	<key>IDESourceControlProjectVersion</key>
-	<integer>110</integer>
-	<key>IDESourceControlProjectWCCIdentifier</key>
-	<string>00213686-1ACC-46C9-9B90-2769BCA1244F</string>
-	<key>IDESourceControlProjectWCConfigurations</key>
-	<array>
-		<dict>
-			<key>IDESourceControlRepositoryExtensionIdentifierKey</key>
-			<string>public.vcs.git</string>
-			<key>IDESourceControlWCCIdentifierKey</key>
-			<string>00213686-1ACC-46C9-9B90-2769BCA1244F</string>
-			<key>IDESourceControlWCCName</key>
-			<string>RETableViewManager</string>
-		</dict>
-	</array>
-</dict>
-</plist>