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The Adobe Experience Manager SDK

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package org.apache.sling.scripting.sightly.compiler.expression;

import org.osgi.annotation.versioning.ProviderType;

/**
 * Defines a node in a HTL expression tree.
 */
@ProviderType
public interface ExpressionNode {

    /**
     * Accept a visitor to process this node.
     *
     * @param visitor The visitor
     * @param      the type of the visitor
     * @return the node after it has been evaluated by the visitor
     */
     T accept(NodeVisitor visitor);

}