Handy way to show dummy image if no image is selected

ImageUri.ts2

prototype(Sfi.Site:ImageUri) < prototype(TYPO3.TypoScript:Case) {
	image {
		condition = ${asset}
		renderer = ImageUri {
			asset = ${asset}
			width = ${width}
			height = ${height}
			maximumWidth = ${maximumWidth}
			maximumHeight = ${maximumHeight}
			allowCropping = ${allowCropping}
			allowUpscaling = ${allowUpscaling}
		}
	}
	dummyImage {
		condition = ${site.context.inBackend}
		renderer = TYPO3.TypoScript:ResourceUri {
			path = 'resource://TYPO3.Neos/Public/Images/dummy-image.svg'
		}
	}
}