syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"Self::VecI128(n)"}]}
source_snippet:             Self::VecI128(n) => n * 16,
context_before:             Self::VecI64(n) => n * 8,
context_after:             Self::VecF16(n) => n * 2,