D10829: Use DocumentId class

[Michael Heidelbach]

michaelh edited the summary of this revision.

REPOSITORY
  R293 Baloo

REVISION DETAIL
  https://phabricator.kde.org/D10829

To: michaelh, adridg, #baloo, #frameworks
Cc: ashaposhnikov, michaelh, kmorwinski, spoorun, nicolasfella, alexeymin