Function rustc_trait_selection::traits::coherence::overlap_within_probe

fn overlap_within_probe<'cx, 'tcx>(
    selcx: &mut SelectionContext<'cx, 'tcx>,
    impl1_def_id: DefId,
    impl2_def_id: DefId,
    overlap_mode: OverlapMode,
    snapshot: &CombinedSnapshot<'tcx>
) -> Option<OverlapResult<'tcx>>