{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":".and_then(|pos|"}]}
        .and_then(|pos| source_file.syntax().token_at_offset(pos.expect_offset()).next()?.parent())
    let file = pos
        .and_then(|it| ImportScope::find_insert_use_container(&it, sema))