syntax_data: {"ast_node_type":"function","tokens":[{"end":56,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn nonzero(width_in_bytes: u64) -> Self {
context_before:     #[allow(dead_code)]
context_after:         const BYTE: RangeInclusive<u8> = 0x00..=0xFF;