{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"extra_data(PassWhere::BeforeBlock(block),"}]}
        extra_data(PassWhere::BeforeBlock(block), w)?;
    for block in body.basic_blocks.indices() {
        write_basic_block(tcx, block, body, extra_data, w, options)?;