syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"x16:"}]}
source_snippet:         x16: reg = ["x16", "a6"] % not_e,
context_before:         x15: reg = ["x15", "a5"],
context_after:         x17: reg = ["x17", "a7"] % not_e,