FixedContent can either be used at the image level to render fixed HTMLcontent. It can also be used as a child of an Image tag in which case the FixedContent tag will be applied if we run out of images when rendering that image.
<FixedContent>
An example of fixed content
</FixedContent
<Image .. >
<FixedContent>
An example of fixed content that's used when we have not more
images to display on this row
</FixedContent>
</Image>