syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"x25:"}]}
source_snippet:         x25: reg = ["x25", "w25"],
context_before:         x24: reg = ["x24", "w24"] % restricted_for_arm64ec,
context_after:         x26: reg = ["x26", "w26"],