/**
     * Creates and returns a new instance of {@link TreeMap}.
     *
     * @param <K> the key type of {@link TreeMap}
     * @param <V> the value type of {@link TreeMap}
     * @return a new instance of {@link TreeMap}
     * @see TreeMap#TreeMap()
     */
    public static <K, V> TreeMap<K, V> newTreeMap() {
        return new TreeMap<>();
    }

    /**

                NavigableMap<String, String> map = populate(new TreeMap<String, String>(), entries);
                return Collections.checkedNavigableMap(map, String.class, String.class);
              }
            })
        .named("checkedNavigableMap/TreeMap, natural")
        .withFeatures(
            MapFeature.GENERAL_PURPOSE,
            MapFeature.ALLOWS_NULL_VALUES,

                SortedMap<String, String> map = populate(new TreeMap<String, String>(), entries);
                return Collections.checkedSortedMap(map, String.class, String.class);
              }
            })
        .named("checkedSortedMap/TreeMap, natural")
        .withFeatures(
            MapFeature.GENERAL_PURPOSE,
            MapFeature.ALLOWS_NULL_VALUES,

  public SafeTreeMap() {
    this(new TreeMap<K, V>());
  }

  public SafeTreeMap(Comparator<? super K> comparator) {
    this(new TreeMap<K, V>(comparator));
  }

  public SafeTreeMap(Map<? extends K, ? extends V> map) {
    this(new TreeMap<K, V>(map));
  }

  public SafeTreeMap(SortedMap<K, ? extends V> map) {
    this(new TreeMap<K, V>(map));
  }

  public SafeTreeMap() {
    this(new TreeMap<K, V>());
  }

  public SafeTreeMap(Comparator<? super K> comparator) {
    this(new TreeMap<K, V>(comparator));
  }

  public SafeTreeMap(Map<? extends K, ? extends V> map) {
    this(new TreeMap<K, V>(map));
  }

  public SafeTreeMap(SortedMap<K, ? extends V> map) {
    this(new TreeMap<K, V>(map));
  }

import java.io.ObjectOutputStream;
import java.util.Collection;
import java.util.Comparator;
import java.util.Map;
import java.util.NavigableMap;
import java.util.NavigableSet;
import java.util.SortedSet;
import java.util.TreeMap;
import java.util.TreeSet;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@code Multimap} whose keys and values are ordered by their natural ordering or

        assertEquals("Set contents should match", original, deserialized);
    }

    /**
     * Test serialization of TreeMap
     */
    @Test
    public void test_serializeDeserialize_treeMap() {
        TreeMap<String, Integer> original = new TreeMap<>();
        original.put("alpha", 1);
        original.put("beta", 2);
        original.put("gamma", 3);

import java.util.EnumMap;
import java.util.EnumSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeMap;
import java.util.TreeSet;
import org.jspecify.annotations.Nullable;

/**
 * An immutable builder for {@link Multimap} instances, letting you independently select the desired

import java.util.EnumMap;
import java.util.EnumSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeMap;
import java.util.TreeSet;
import org.jspecify.annotations.Nullable;

/**
 * An immutable builder for {@link Multimap} instances, letting you independently select the desired

import java.util.Comparator;
import java.util.Iterator;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.SortedMap;
import java.util.SortedSet;
import java.util.TreeMap;
import org.jspecify.annotations.Nullable;

/**
 * Implementation of {@code Table} whose row keys and column keys are ordered by their natural