{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
    let const_ = name.syntax().parent().and_then(ast::Const::cast)?;
fn find_assoc_const_usage(name: &ast::NameLike) -> Option<(ast::Type, ast::Expr)> {
    const_.syntax().parent().and_then(ast::AssocItemList::cast)?;