pub(super) fn parse_headers<T>(
    bytes: &mut BytesMut,
    prev_len: Option<usize>,
    ctx: ParseContext<'_>,
) -> Result<Option<ParsedMessage<T::Incoming>>, Parse>where
    T: Http1Transaction,pub(super) fn parse_headers<T>(
    bytes: &mut BytesMut,
    prev_len: Option<usize>,
    ctx: ParseContext<'_>,
) -> Result<Option<ParsedMessage<T::Incoming>>, Parse>where
    T: Http1Transaction,