syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // This cannot actually be toggled, the ABI always fixes it, so it'd make little sense to
context_before:     ("sm4", Stable, &["avx2"]),
context_after:     // stabilize. It must be in this list for the ABI check to be able to use it.