def get_action(plugin, action_id)
      the_plugin = hawk_escape plugin
      the_action_id = hawk_escape action_id
      ret = http_get "/actions/#{the_plugin}/#{the_action_id}"
      Trigger::Action.new(ret)
    end
def get_action(plugin, action_id)
      the_plugin = hawk_escape plugin
      the_action_id = hawk_escape action_id
      ret = http_get "/actions/#{the_plugin}/#{the_action_id}"
      Trigger::Action.new(ret)
    end
Obtains one action of given action plugin from the server.
 @param [String] plugin Id of the action plugin
 @param [String] action_id Id of the action
 @return [Action] the selected trigger