syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"Mutability::Not"}]}
source_snippet:             Mutability::Not => (LangItem::Deref, sym::deref),
context_before:         let (trait_item, method) = match mutability {
context_after:             Mutability::Mut => (LangItem::DerefMut, sym::deref_mut),