You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: alter.rs
    path of file: ./repos/skytable/server/src/engine/core/tests/ddl_space
    
    the code of the file until where you have to start completion: /*
 * Created on Thu Feb 09 2023
 *
 * This file is a part of Skytable
 * Skytable (formerly known as TerrabaseDB or Skybase) is a free and open-source
 * NoSQL database written by Say
    
fn alter_add_prop_env_var() {
    let global = TestGlobal::new_with_driver_id("alter_add_prop_env_var");
    super::exec_create_alter(
        &global,
        "create space myspace",
        "alter space myspace with { env: { MY_NEW_PROP: 100 } }",
        |space| {
            assert_eq!(
                space,
                &Space::new_restore_empty(
                    space.get_uuid(),
                    into_dict!("env" => DictEntryGeneric::Map(into_dict!("MY_NEW_PROP" => Datacell::new_uint_default(100)))),
                )
            );
        },
    )
    .unwrap();
}