put all DrawableScreenshot access into the base class.

Author: Torsten-Mumme

src/main/java/net/itarray/automotion/internal/ResponsiveUIChunkValidatorBase.java

@@ -457,7 +457,7 @@ protected void storeRootDetails(JSONObject rootDetails) {
     @Override
     protected void drawRootElement() {
         if (!rootElements.isEmpty()) {
-            drawableScreenshot.drawRootElement(rootElements.get(0));
+            drawElement(rootElements.get(0));
         }
     }
 }

src/main/java/net/itarray/automotion/internal/ResponsiveUIValidatorBase.java

@@ -23,7 +23,7 @@ public abstract class ResponsiveUIValidatorBase {
     protected final UISnapshot snapshot;
     private final DriverFacade driver;
     private final double zoomFactor;
-    protected DrawableScreenshot drawableScreenshot;
+    private DrawableScreenshot drawableScreenshot;
 
     protected ResponsiveUIValidatorBase(UISnapshot snapshot) {
         this.snapshot = snapshot;
@@ -242,4 +242,8 @@ protected void drawHorizontalLine(Scalar y) {
             drawableScreenshot.drawHorizontalLine(y);
         }
     }
+
+    protected void drawElement(UIElement element) {
+        drawableScreenshot.drawRootElement(element);
+    }
 }

src/main/java/net/itarray/automotion/internal/UIValidatorBase.java

@@ -609,7 +609,7 @@ protected void storeRootDetails(JSONObject rootDetails) {
 
     @Override
     protected void drawRootElement() {
-        drawableScreenshot.drawRootElement(rootElement);
+        drawElement(rootElement);
     }
 
     private void drawLeftOffsetLine() {