syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"r13r12:"}]}
source_snippet:         r13r12: reg_pair = ["r13r12"],
context_before:         r11r10: reg_pair = ["r11r10"],
context_after:         r15r14: reg_pair = ["r15r14"],