Function MDCopyLabelWithUUID 

pub unsafe extern "C-unwind" fn MDCopyLabelWithUUID(
    label_uuid: Option<&CFUUID>,
) -> Option<CFRetained<MDLabel>>

Available on crate feature MDLabel only.

Copy the label with the specified UUID.

Parameter labelUUID: The label UUID.

Returns: An MDLabelRef, or NULL on failure.

Safety

label_uuid might not allow None.