syntax_data: {"ast_node_type":"other","tokens":[{"end":6,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     //
context_before:     // If a "next" node ID is '0', it means it's the end of the test vector.
context_after:     // As the compiler tracks expression in pre-order, we can ensure that condition info of parents are always properly assigned when their children are visited.