syntax_data: {"ast_node_type":"function","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let clone_fn = this.tcx.associated_item_def_ids(clone_trait)[0];
context_before:                     let clone_trait = this.tcx.require_lang_item(LangItem::Clone, span);
context_after:                     let func = Operand::function_handle(this.tcx, clone_fn, [ty.into()], expr_span);