syntax_data: {"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"GenericConstantTooComplexSub::AddressAndDerefNotSupported(node.span),"}]}
source_snippet:             GenericConstantTooComplexSub::AddressAndDerefNotSupported(node.span),
context_before:         ExprKind::RawBorrow { .. } | ExprKind::Deref { .. } => maybe_supported_error(
context_after:         )?,