syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"r10:"}]}
source_snippet:         r10: reg = ["r10","l6"],// feature e2
context_before:         r9: reg = ["r9","l5"],// feature e2
context_after:         r11: reg = ["r11","l7"],// feature e2