def process_power_levels(room, data)
      data.each do |id, level|
        get_user(id).process_power_level room, level
      end
    end
def process_power_levels(room, data)
      data.each do |id, level|
        get_user(id).process_power_level room, level
      end
    end
Process power level updates.

 @param room [Room] The room this event came from.
 @param data [Hash{String=>Fixnum}] Power level data, a hash of user IDs
   and their associated power level.