1. override
void render(RenderState renderState)

Renders this display object with the given renderState. The display object is rendered without its filters.

Source 

@override
void render(RenderState renderState) {
  if (bitmapData != null) {
    var renderTextureQuad = _getRenderTextureQuad();
    renderState.renderTextureQuad(renderTextureQuad);
  }
}