src/jdk.compiler/share/classes/com/sun/source/doctree/DocTreeVisitor.java

*** 52,62 ****
   *            methods.  Use {@code Void} for visitors that do not need an
   *            additional parameter.
   *
   * @since 1.8
   */
- @jdk.Exported
  public interface DocTreeVisitor<R,P> {
  
      /**
       * Visits an AttributeTree node.
       * @param node the node being visited
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