Is KoUnavailPart still useful?

[Friedrich W. H. Kossebau]

Am Sonntag, 13. Mai 2012, 17:20:33 schrieb Boudewijn Rempt:
> On Sunday 13 May 2012 May, Friedrich W. H. Kossebau wrote:
> > Hi,
> > 
> > I am puzzled by KoUnavailPart. Is it still in use? How is an instance of
> > the part instantiated?
> > 
> > From the comment in the header kounavail.h (referencing some
> > KoDocumentChild) I would guess the part is completely outdated and just
> > cruft and should be removed.
> > 
> > KoUnavailShape has substituted it completely, right?
> 
> Er, well, no. The unavail part is supposed to popup in konqueror when
> opening a document for which no proper part is available, at least to my
> understanding. To that effect, it's still moderestly relevant.

But by what mechanism is it invoked? It has no mimetype assigned, so how would 
it ever be included in a query?
Who would ask for services just by the service type CalligraPart?

Cheers
Friedrich