Grid preview of files
The gallery mosaic component provides a way of previewing images in a mosaic style based on the amount of elements, it currently supports a general file type and images.
The singleImagefit input is used to specify how a single image in the modern structure should be rendered and fit. The concept is similar to the Picture's object fitgallery specific behaviors.
'contain'
This forces the whole image to be fit inside the whole width of the container. The height of the image will be scaled proportionally.

'cover'
This forces the image to fit in a
Image optimization caveat

Forces the cover items to be rectangular
Total spacing between each gallery item
This variable defines how an image is to be loaded
This input only works when `forceRectangleMedium` is applied
Rounds the gallery's container or item corners
How a single image should fit in the container.