syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"tcx.assumed_wf_types(fn_def_id.expect_local()).to_vec(),"}]}
source_snippet:                         tcx.assumed_wf_types(fn_def_id.expect_local()).to_vec(),
context_before:                         tcx,
context_after:                         |region, _| {