{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"Some(index_map.new_id(ErasedFileAstIdKind::ExternBlock,"}]}
        Some(index_map.new_id(ErasedFileAstIdKind::ExternBlock, ()))
    if ast::ExternBlock::can_cast(node.kind()) {
    } else {