{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"iter::successors(Some(module_ast.clone()),"}]}
        iter::successors(Some(module_ast.clone()), |module| module.parent()).last()?;
    let outermost_mod_decl =
    let module_def = ctx.sema.to_def(&outermost_mod_decl)?;