syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"r16:"}]}
source_snippet:         r16: reg, reg_nonzero = ["r16", "16"],
context_before:         r15: reg, reg_nonzero = ["r15", "15"],
context_after:         r17: reg, reg_nonzero = ["r17", "17"],