Mime media type. Values are not strictly defined.
Examples can be found here: https://en.wikipedia.org/wiki/Media_type. Typical examples for images are:
"image/png"
"image/jpeg"
"image/gif"
Error rendering macro 'incoming-links'
'com.atlassian.confluence.spaces.SpacesQuery$Builder com.atlassian.confluence.spaces.SpacesQuery$Builder.forUser(com.atlassian.confluence.user.ConfluenceUser)'
