syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"x29:"}]}
source_snippet:         x29: reg = ["x29", "t4"] % not_e,
context_before:         x28: reg = ["x28", "t3"] % not_e,
context_after:         x30: reg = ["x30", "t5"] % not_e,