get_show_in

Checks if the application info should be shown in menus that list available applications for a specific name of the desktop, based on the `OnlyShowIn` and `NotShowIn` keys.

desktop_env should typically be given as null, in which case the `XDG_CURRENT_DESKTOP` environment variable is consulted. If you want to override the default mechanism then you may specify desktop_env, but this is not recommended.

Note that should_show for this will include this check (with null for desktop_env) as well as additional checks.

Parameters:

this	a DesktopAppInfo
desktop_env	a string specifying a desktop name

Returns:

true if the this should be shown in desktop_env according to the `OnlyShowIn` and `NotShowIn` keys, false otherwise.