Java optimization: introduce PsiArrayInitializerExpression.getInitializerCount() and use it where possible (IDEA-375485)

GitOrigin-RevId: 1d54ca3773469a22db195a1667ce21cdc679a324

java/java-psi-impl/src/com/intellij/psi/impl/source/tree/java/PsiArrayInitializerExpressionImpl.java

@@ -1,18 +1,4 @@
-/*
- * Copyright 2000-2012 JetBrains s.r.o.
- *
- * 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.
- */
+// Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.psi.impl.source.tree.java;
 
 import com.intellij.lang.ASTNode;
@@ -36,6 +22,11 @@ public class PsiArrayInitializerExpressionImpl extends ExpressionPsiElement impl
     return getChildrenAsPsiElements(ElementType.EXPRESSION_BIT_SET, PsiExpression.ARRAY_FACTORY);
   }
 
+  @Override
+  public int getInitializerCount() {
+    return countChildren(ElementType.EXPRESSION_BIT_SET);
+  }
+
   @Override
   public PsiType getType(){
     if (getTreeParent() instanceof PsiNewExpression){