syntax_data: {"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // If either is an error, return it
context_before:             | (Answer::No(reason), Answer::No(_))
context_after:             | (Answer::No(reason), _) | (_, Answer::No(reason)) => Answer::No(reason),