syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // adopted a more general `@` operator, there might be more
context_before:         // afaik, there can be at most one. (In the future, if we
context_after:         // than one, but it'd be very unusual to have two sides that