'**SUMMARY**
Return all DrawingLayer objects as a single DrawingLayer.
**RETURNS**
Returns a drawing layer with all of the drawing layers of this image merged into one.
**EXAMPLE**
>>> img = Image("Lenna")
>>> myLayer1 = DrawingLayer((img.width,img.height))
>>> myLayer2 = DrawingLayer((img.width,img.height))
>>> img.insertDrawingLayer(myLayer1,1) # on top
>>> img.insertDrawingLayer(myLayer2,2) # on the bottom
>>> derp = img.mergedLayers()
**SEE ALSO**
:py:class:`DrawingLayer`
:py:meth:`addDrawingLayer`
:py:meth:`dl`
:py:meth:`toPygameSurface`
:py:meth:`getDrawingLayer`
:py:meth:`removeDrawingLayer`
:py:meth:`layers`
:py:meth:`applyLayers`
:py:meth:`drawText`
:py:meth:`drawRectangle`
:py:meth:`drawCircle`
:py:meth:`blit`'

def mergedLayers(self):

    final = DrawingLayer(self.size())
    for layers in self._mLayers:
        layers.renderToOtherLayer(final)
    return final
