syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"x28:"}]}
source_snippet:         x28: reg = ["x28", "w28"] % restricted_for_arm64ec,
context_before:         x27: reg = ["x27", "w27"],
context_after:         x30: reg = ["x30", "w30", "lr", "wlr"],