[Dune] Capability hasLeafIterator?

[Oliver Sander]

Dear Dune!

The namespace Capabilities contains a traits class hasLeafIterator.
I thought every grid implementation absolutely has to have leaf iterators?

--
Oliver

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* Oliver Sander                ** email: sander at mi.fu-berlin.de        *
* Freie Universität Berlin     ** phone: + 49 (30) 838 75217           *
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