syntax_data: {"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let vptr = Pointer::from(supertrait_alloc_id);
context_before:                 let supertrait_alloc_id = tcx.vtable_allocation((ty, Some(super_trait_ref)));
context_after:                 Scalar::from_pointer(vptr, &tcx)