{"ast_node_type":"function","tokens":[{"end":98,"kind":"keyword","start":0,"text":"fn"}]}
fn use_tree_source_map(db: &dyn DefDatabase, use_ast_id: AstId<ast::Use>) -> Arena<ast::UseTree> {
/// Maps a `UseTree` contained in this import back to its AST node.
    // Re-lower the AST item and get the source map.