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 // Copyright 2007 The Apache Software Foundation
 // 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
 // Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry5;

Callback interface that allows for visiting the option groups and option models of a select model in correct render order.
public interface SelectModelVisitor
Invoked once for each OptionGroupModel, just before invoking option(org.apache.tapestry5.OptionModel) for each embedded option within the group.
    void beginOptionGroup(OptionGroupModel groupModel);

Invoked for each option within a group, and at the end, for each ungrouped option.

    void option(OptionModel optionModel);

Invoked after all options within the group have been visited.
    void endOptionGroup(OptionGroupModel groupModel);
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