pub fn impl_(
attrs: impl IntoIterator<Item = Attr>,
generic_params: Option<GenericParamList>,
generic_args: Option<GenericArgList>,
path_type: Type,
where_clause: Option<WhereClause>,
body: Option<AssocItemList>,
) -> Implpub fn impl_(
attrs: impl IntoIterator<Item = Attr>,
generic_params: Option<GenericParamList>,
generic_args: Option<GenericArgList>,
path_type: Type,
where_clause: Option<WhereClause>,
body: Option<AssocItemList>,
) -> Impl