objc2_core_foundation

Function CFPreferencesGetAppBooleanValue

Source 
pub unsafe extern "C-unwind" fn CFPreferencesGetAppBooleanValue(
    key: &CFString,
    application_id: &CFString,
    key_exists_and_has_valid_format: *mut u8,
) -> bool
Available on crate features CFBase and CFPreferences only.