使用 AssertTools 替代 Preconditions

src/main/java/xyz/zhouxy/plusone/commons/util/TreeBuilder.java

@@ -27,8 +27,6 @@ import java.util.stream.Collectors;
 
 import javax.annotation.Nullable;
 
-import com.google.common.base.Preconditions;
-
 /**
  * TreeBuilder
  *
@@ -63,7 +61,7 @@ public class TreeBuilder<T, TSubTree extends T, TIdentity> {
      * @param nodes 平铺的节点列表
      */
     public List<T> buildTree(Collection<T> nodes) {
-        Preconditions.checkNotNull(nodes);
+        AssertTools.checkNotNull(nodes);
         return buildTreeInternal(nodes, this.defaultComparator);
     }
 
@@ -80,7 +78,7 @@ public class TreeBuilder<T, TSubTree extends T, TIdentity> {
      *                   <b>仅影响调用 addChild 的顺序，如果操作对象本身对应的控制了子节点的顺序，无法影响其相关逻辑。</b>
      */
     public List<T> buildTree(Collection<T> nodes, @Nullable Comparator<? super T> comparator) {
-        Preconditions.checkNotNull(nodes);
+        AssertTools.checkNotNull(nodes);
         final Comparator<? super T> c = (comparator != null) ? comparator : this.defaultComparator;
         return buildTreeInternal(nodes, c);
     }