syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"x22:"}]}
source_snippet:         x22: reg = ["x22", "w22"],
context_before:         x21: reg = ["x21", "w21"],
context_after:         x23: reg = ["x23", "w23"] % restricted_for_arm64ec,