writeln!(w, "\t\tself.datalen = 0;").unwrap();
writeln!(w, "\t\tret").unwrap();
writeln!(w, "\t}}").unwrap();
writeln!(w, "\t#[allow(unused)] pub(crate) fn as_slice(&self) -> &[{}] {{", inner_type).unwrap();
writeln!(w, "\t\tself.datalen = 0;").unwrap();
writeln!(w, "\t\tret").unwrap();
writeln!(w, "\t}}").unwrap();
writeln!(w, "\t#[allow(unused)] pub(crate) fn as_slice(&self) -> &[{}] {{", inner_type).unwrap();