syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"r16:"}]}
source_snippet:         r16: reg = ["r16","l8"],// feature high-register
context_before:         r13: reg = ["r13","t1"],// feature e2
context_after:         r17: reg = ["r17","l9"],// feature high-register