Old: public constructor(Url url, str originalFileName = null, LayerExpr layer=null, int previewSize=125) { New: public constructor(Url url, str originalFileName = null, LayerExpr layer=null, int previewSize=125, bool filled=true) { Old: public constructor(str key, LayerExpr layer=null, int previewSize=125) { New: public constructor(str key, LayerExpr layer=null, int previewSize=125, bool filled=true) {