{"ast_node_type":"variable","tokens":[{"end":15,"kind":"keyword","start":0,"text":"let"}]}
    let mut p =
pub(super) fn print_item_tree(db: &dyn DefDatabase, tree: &ItemTree, edition: Edition) -> String {
        Printer { db, tree, buf: String::new(), indent_level: 0, needs_indent: true, edition };