syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"tcx.normalize_erasing_regions(typing_env,"}]}
source_snippet:             tcx.normalize_erasing_regions(typing_env, ty)
context_before:         tcx.struct_lockstep_tails_raw(source, target, |ty| {
context_after:         })