syntax_data: {"ast_node_type":"import","tokens":[{"end":82,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // because slices and arrays have the same valtree representation.
context_before:                 // pattern's type means we'll properly translate it to a slice reference pattern. This works
context_after:                 // HACK: As an exception, use the literal's type if `pat_ty` is `String`; this can happen if