'IGraphicsData' Type Error?

programming flash
1

Hi guys. Could someone explain this to me please.

var gfxStroke:GraphicsStroke = new GraphicsStroke(1);
var gfxFill:GraphicsSolidFill = new GraphicsSolidFill(0x00FFFF, 1);
takesAnyStrokeAndAnyFill(gfxStroke,  gfxFill);
function takesAnyStrokeAndAnyFill(stroke:IGraphicsStroke,  fill:IGraphicsFill):void {
    var style:Vector.<IGraphicsData> = new Vector.<IGraphicsData>(2, true);
    style[0] = stroke;//Implicit coercion of a value of type flash.display:IGraphicsStroke to an unrelated type flash.display:IGraphicsData
    style[1] = fill;//Implicit coercion of a value of type flash.display:IGraphicsFill to an unrelated type flash.display:IGraphicsData
}

Here’s the full code for quick testing:


package
{
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.display.*;
    public class Main extends Sprite 
    {        
        public function Main():void 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        };
        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);
            var gfxStroke:GraphicsStroke = new GraphicsStroke(1);            
            var gfxFill:GraphicsSolidFill = new GraphicsSolidFill(0x00FFFF, 1);
            takesAnyStrokeAndAnyFill(gfxStroke, gfxFill);
            function takesAnyStrokeAndAnyFill(stroke:IGraphicsStroke = null, fill:IGraphicsFill = null):void
            {
                
                var style:Vector.<IGraphicsData> = new Vector.<IGraphicsData>(2, true);
                style[0] = stroke;//Implicit coercion of a value of type flash.display:IGraphicsStroke to an unrelated type flash.display:IGraphicsData
                style[1] = fill;//Implicit coercion of a value of type flash.display:IGraphicsFill to an unrelated type flash.display:IGraphicsData
            };
        };
    };
};