syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"obligations.push(Obligation::with_depth("}]}
source_snippet:                 obligations.push(Obligation::with_depth(
context_before:                 let outlives = ty::OutlivesPredicate(r_a, r_b);
context_after:                     tcx,