fn parse_tf_attribute<'c, S: Stage>(
cx: &'c mut AcceptContext<'_, '_, S>,
args: &'c ArgParser<'_>,
) -> impl IntoIterator<Item = (Symbol, Span)> + 'c
fn parse_tf_attribute<'c, S: Stage>(
cx: &'c mut AcceptContext<'_, '_, S>,
args: &'c ArgParser<'_>,
) -> impl IntoIterator<Item = (Symbol, Span)> + 'c