syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"(ast::LitKind::ByteStr(byte_sym,"}]}
source_snippet:         (ast::LitKind::ByteStr(byte_sym, _), ty::Slice(_) | ty::Array(..))
context_before:         }
context_after:             if tcx.features().deref_patterns() =>