syntax_data: {"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"Self::ymm_reg"}]}
source_snippet:             Self::ymm_reg => Some(('y', "ymm0", 256).into()),
context_before:             Self::xmm_reg => Some(('x', "xmm0", 128).into()),
context_after:             Self::zmm_reg => Some(('z', "zmm0", 512).into()),