syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"x19:"}]}
source_snippet:         x19: reg = ["x19", "s3"] % not_e,
context_before:         x18: reg = ["x18", "s2"] % not_e,
context_after:         x20: reg = ["x20", "s4"] % not_e,