syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // Compute the bounds on Self and the type parameters.
context_before: fn param_env(tcx: TyCtxt<'_>, def_id: DefId) -> ty::ParamEnv<'_> {
context_after:     let ty::InstantiatedPredicates { mut predicates, .. } =