syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // might contain statements that we don't want on the LHS path.)
context_before:                 // (We can't just make LHS goto RHS, because `rhs_success_block`
context_after:                 let success_block = this.cfg.start_new_block();