syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"tcx.require_lang_item(hir::LangItem::StructuralPeq,"}]}
source_snippet:         tcx.require_lang_item(hir::LangItem::StructuralPeq, DUMMY_SP);
context_before:     let structural_partial_eq_trait_id =