title: How to use image placeholders for preview with Jetpack Compose
body: <p>With XML, we had the option to use <code>tools:</code> for designing by using placeholders when real data is not available. Do we have something similar in Jetpack Compose?</p>
  <p>I know I can pass sample data to my composable in a dedicated preview function. But for instance, when an image  source is a URL (that loads by Coil, Glide.. ), even if I pass a sample URL, it can't be loaded in preview. A practical solution for that could save development time.</p>