syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"r15r14:"}]}
source_snippet:         r15r14: reg_pair = ["r15r14"],
context_before:         r13r12: reg_pair = ["r13r12"],
context_after:         r17r16: reg_pair = ["r17r16"],