}

    /**
     * {@link HashMap}の新しいインスタンスを作成して返します。
     *
     * @param <K>
     *            {@link HashMap}のキーの型
     * @param <V>
     *            {@link HashMap}の値の型
     * @return {@link HashMap}の新しいインスタンス
     * @see HashMap#HashMap()
     */
    public static <K, V> HashMap<K, V> newHashMap() {
        return new HashMap<>();
    }

    /**

    Map<@Nullable String, String> hashmap = Maps.newHashMap();
    hashmap.put("foo", "bar");
    hashmap.put(null, "baz");

    assertEquals(hashmap.toString(), Maps.toStringImpl(hashmap));
  }

  public void testToStringImplWithNullValues() throws Exception {
    Map<String, @Nullable String> hashmap = Maps.newHashMap();
    hashmap.put("foo", "bar");
    hashmap.put("baz", null);

    Map<@Nullable String, String> hashmap = Maps.newHashMap();
    hashmap.put("foo", "bar");
    hashmap.put(null, "baz");

    assertEquals(hashmap.toString(), Maps.toStringImpl(hashmap));
  }

  public void testToStringImplWithNullValues() throws Exception {
    Map<String, @Nullable String> hashmap = Maps.newHashMap();
    hashmap.put("foo", "bar");
    hashmap.put("baz", null);

            return;
        }

        Map<String, Plugin> plugins = new HashMap<>();
        Map<String, String> versions = new HashMap<>();
        Map<String, String> managedVersions = new HashMap<>();

        for (int i = lineage.size() - 1; i >= 0; i--) {
            Model model = lineage.get(i);
            Build build = model.getBuild();

import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.URLDecoder;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.UUID;
import java.util.function.Supplier;

import javax.annotation.PostConstruct;
import javax.servlet.FilterChain;

package org.apache.maven.project;

import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Properties;
import java.util.Set;

 * under the License.
 */
package org.apache.maven.internal.impl.model;

import java.io.File;
import java.util.Arrays;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;

import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.function.BiConsumer;
import java.util.function.BiFunction;
import java.util.function.Function;

                    }
                    return null;
                }).filter(o -> o != null && keySet.add(o.getFirst())).collect(HashMap<String, List<String>>::new,
                        (m, d) -> m.put(d.getFirst(), Arrays.asList(d.getSecond().split(","))), HashMap::putAll));
            }
            propMap.put(DEFAULT_LABEL_VALUES, map);
        }
        return map.entrySet().stream().flatMap(e -> {

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.NavigableSet;