syntax_data: {"ast_node_type":"variable","tokens":[{"end":70,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let item_def_id = trait_item_ref.owner_id.to_def_id();
context_before:             tcx.arena.alloc_from_iter(trait_item_refs.iter().flat_map(|trait_item_ref| {
context_after:                 [item_def_id]