syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // FIXME(RalfJung): I don't think it would be correct to do any checks for
context_before:                 // This is a newtype, so keep recursing.
context_after:                 // alignment here, so we don't. Is that correct?