Retrieves the list of content types that app_info claims to support.
If this information is not provided by the environment, this function
will return null.
This function does not take in consideration associations added with
gio.app_info.AppInfo.addSupportsType, but only those exported directly by
the application.
Retrieves the list of content types that app_info claims to support. If this information is not provided by the environment, this function will return null. This function does not take in consideration associations added with gio.app_info.AppInfo.addSupportsType, but only those exported directly by the application.