{"ast_node_type":"impl","tokens":[{"end":81,"kind":"keyword","start":0,"text":"///"}]}
    ///    have to suggest changing both the impl `fn` arg and the trait `fn` arg
    ///  - is the current item an assoc `fn` of an impl that corresponds to a trait def? if so, we
    ///  - is the trait from the local crate? If not, we can't suggest changing signatures