/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package freemarker.core;

import freemarker.template.TemplateModel;

/**
 * Don't use this; used internally by FreeMarker, might change without notice.
 * 
 * <p>Implemented by {@link TemplateModel}-s that can explain why they don't implement a certain type. 
 * */
public interface _UnexpectedTypeErrorExplainerTemplateModel extends TemplateModel {

    /**
     * @return A single {@link _ErrorDescriptionBuilder} tip, or {@code null}.
     */
    Object[] explainTypeError(Class[]/*<? extends TemplateModel>*/ expectedClasses);
    
}