Fbml.getCustomTags

Description

Returns the custom tag definitions for tags that were previously defined using fbml.registerCustomTags.

Required	Name	Type	Description
optional	app_id	`string`	The ID of the application whose custom tags you want to get. If the ID is the calling application's ID, all the application's custom tags are returned. Otherwise, only the application's public custom tags are returned. (Default value is the calling application's ID.).