Function parse_method_no_na 

pub(crate) fn parse_method_no_na(
    meta: &ParseNestedMeta<'_>,
    per_param: &mut HashMap<String, ParamAttrs>,
) -> Result<()>

Method-level no_na(p, q(message = "...")) on an impl or trait method, whose parameters cannot carry attributes: each entry names a parameter, optionally with the condition message of its NA check. Shared by the inherent-impl and trait-impl method parsers.