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: check_remove_and_get_speculative.rs
    path of file: ./repos/snarkVM/ledger/store/src/helpers/test_helpers/map
    
    the code of the file until where you have to start completion: // Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::helpers::Map;

use std::borrow::Cow;

pub fn check_remove_and_get_speculative(map: impl for<'a> Map<'a, usize, String>) {
    // Sanity check.
    assert!(map.iter_confirme
    
pub fn check_remove_and_get_speculative(map: impl for<'a> Map<'a, usize, String>) {
    // Sanity check.
    assert!(map.iter_confirmed().next().is_none());

    // Insert an item into the map.
    map.insert(0, "0".to_string()).unwrap();

    // Check that the item is present in the map .
    assert_eq!(map.get_confirmed(&0).unwrap(), Some(Cow::Owned("0".to_string())));
    // Check that the item is not in the batch.
    assert_eq!(map.get_pending(&0), None);
    // Check that the item can be speculatively retrieved.
    assert_eq!(map.get_speculative(&0).unwrap(), Some(Cow::Owned("0".to_string())));

    /* test atomic removals */

    // Start an atomic write batch.
    map.start_atomic();

    // Remove the item from the map.
    map.remove(&0).unwrap();

    // Check that the item still exists in the map.
    assert_eq!(map.get_confirmed(&0).unwrap(), Some(Cow::Owned("0".to_string())));
    // Check that the item is removed in the batch.
    assert_eq!(map.get_pending(&0), Some(None));
    // Check that the item is removed when speculatively retrieved.
    assert_eq!(map.get_speculative(&0).unwrap(), None);

    // Try removing the item again.
    map.remove(&0).unwrap();

    // Check that the item still exists in the map.
    assert_eq!(map.get_confirmed(&0).unwrap(), Some(Cow::Owned("0".to_string())));
    // Check that the item is removed in the batch.
    assert_eq!(map.get_pending(&0), Some(None));
    // Check that the item is removed when speculatively retrieved.
    assert_eq!(map.get_speculative(&0).unwrap(), None);

    // Finish the current atomic write batch.
    map.finish_atomic().unwrap();

    // Check that the item is not present in the map now.
    assert!(map.get_confirmed(&0).unwrap().is_none());
    // Check that the item is not in the batch.
    assert_eq!(map.get_pending(&0), None);
    // Check that the item is removed when speculatively retrieved.
    assert_eq!(map.get_speculative(&0).unwrap(), None);

    // Check that the map is empty now.
    assert!(map.iter_confirmed().next().is_none());
}