# File lib/openshift-origin-controller/app/models/application.rb, line 1429
  def group_instances=(data)
    group_instance_map_will_change!    
    @group_instance_map = {} if @group_instance_map.nil?
    data.each do |value|
      if value.class == GroupInstance
        value.reused_by.each do |k|
          @group_instance_map[k] = value
        end
      else
        ginst = GroupInstance.new(self)
        ginst.attributes=value
        ginst.reused_by.each do |k|
          @group_instance_map[k] = ginst
        end
      end
    end
  end