# File lib/plugins/issue-claiming.rb, line 30
  def unclaim who, comment, force=false
    raise Error, "not claimed" unless claimer
    raise Error, "can only be unclaimed by #{claimer}" unless claimer == who || force
    if claimer == who
      log "issue unclaimed", who, comment
    else
      log "unassigned from #{claimer}", who, comment
    end
    self.claimer = nil
  end