Find fallback icon outside of icon themes. The first found is returned.
assert(findFallbackIcon("pidgin", ["test"], defaultIconExtensions) == buildPath("test", "pidgin.png")); assert(findFallbackIcon("nonexistent", ["test"], defaultIconExtensions).empty);
lookupFallbackIcon, icontheme.paths.baseIconDirs
See Implementation
Find fallback icon outside of icon themes. The first found is returned.