Variable IconThemeFile.IconThemeReadOptions.unknownGroupPolicy

Set policy about unknown groups. By default they are skipped without errors. Note that all groups still need to be preserved if desktop file must be rewritten.

struct IconThemeFile.IconThemeReadOptions
{
  // ...
  IconThemeFile.UnknownGroupPolicy unknownGroupPolicy = cast(UnknownGroupPolicy)cast(ubyte)0u;
  // ...
}