{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"///"}]}
    /// and return it, or `None`, if no such item was defined there.
    /// Finds item with name `item_ident` defined in impl/trait `def_id`
    fn associated_value(&self, def_id: DefId, item_ident: Ident) -> Option<ty::AssocItem> {