syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"tcx.erase_regions(GenericArgs::identity_for_item(tcx,"}]}
source_snippet:                 tcx.erase_regions(GenericArgs::identity_for_item(tcx, def_id)),
context_before:                 def_id,
context_after:             );