syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"(0..width_in_bytes)"}]}
source_snippet:                 (0..width_in_bytes)
context_before:             .map(|nz_idx| {
context_after:                     .map(|pos| Self::byte(if pos == nz_idx { NONZERO } else { BYTE }))