syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"tcx.require_lang_item(hir::LangItem::DiscriminantKind,"}]}
source_snippet:                     tcx.require_lang_item(hir::LangItem::DiscriminantKind, DUMMY_SP),
context_before:                 let assoc_items = tcx.associated_item_def_ids(
context_after:                 );