syntax_data: {"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"|ocx,"}]}
source_snippet:         |ocx, ParamEnvAnd { param_env, value: goal }| {
context_before:         &goal,
context_after:             let obligations = tcx.predicates_of(goal.def_id).instantiate_own(tcx, goal.args).map(