def update_remote
    puts "State = #{state.inspect}"
    if previous_state != state # State changed!
      if state == 'local_only' && previous_state == 'reserved'
        # Cancel slot
        result = channel.plugin_instance.remove_reservation(self)
        state = 'reserved' unless result
      elsif @slot_id
        # Reserve slot
        result = channel.plugin_instance.add_reservation(self, @slot_id)

        state = 'local_only' unless result
        # Publish content
        publish_content
      else
        state = 'local_only'
        result = true
      end
    elsif state == 'reserved' # Update fields
      result = channel.plugin_instance.update_reservation(self, @slot_id)
    end
    previous_state = state if result
    puts "State = #{state.inspect}, prev. state = #{previous_state.inspect}, result = #{result}"
    return result
  end