syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"r5:"}]}
source_snippet:         r5: reg, reg_nonzero = ["r5", "5"],
context_before:         r4: reg, reg_nonzero = ["r4", "4"],
context_after:         r6: reg, reg_nonzero = ["r6", "6"],