syntax_data: {"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let obligations = tcx.predicates_of(goal.def_id).instantiate_own(tcx, goal.args).map(
context_before:         |ocx, ParamEnvAnd { param_env, value: goal }| {
context_after:                 |(predicate, span)| {