syntax_data: {"ast_node_type":"function","tokens":[{"end":43,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet: pub(crate) fn supertrait_vtable_slot<'tcx>(
context_before: /// A return value of `None` means that the original vtable can be reused.
context_after:     tcx: TyCtxt<'tcx>,