Function parse_trailers_with_config 

pub fn parse_trailers_with_config<'headers, 'src>(
    src: &'src [u8],
    headers: &'headers mut [HeaderSlot],
    config: HeadParserConfig,
) -> Result<ParseStatus<Trailers<'headers, 'src>>, ParseError>

Available on crate feature icap only.

Parse one trailer field block with explicit bounds and folding.