use super::MAX_DATA_LEN; /// The error returned by most functions in the [`encode`](crate::encode) module#[derive(Debug, thiserror::Error)]#[expect(missing_docs)]pub enum Error {    #[error("Cannot encode more than {MAX_DATA_LEN} bytes, got {length_in_bytes}")]    DataLengthLimitExceeded { length_in_bytes: usize },    #[error("Empty lines are invalid")]    DataIsEmpty,} pub(crate) fn u16_to_hex(value: u16) -> [u8; 4] {    let mut buf = [0u8; 4];    faster_hex::hex_encode(&value.to_be_bytes(), &mut buf).expect("two bytes to 4 hex chars never fails");    buf}