syntax_data: {"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":"Self::alt([x,"}]}
source_snippet:         Self::alt([x, y, z])
context_before:         let z = Self::from_big_endian(order, [_0, 0x01..=0x10, BYTE, BYTE]);
context_after:     }