message: Remove Javadoc references to Entry.withNextId(), which was not implemented.
  This aligns the documentation with the current implementation.
diff: @@ -80,9 +80,9 @@ public final class KeysetHandle {
  * . 7
  *
  * <p>All these functions return a {@code KeysetBuilder.Entry}. It is necessary to assign an ID to
  - * a new entry by calling one of {@link Entry#withNextId}, {@link Entry#withFixedId}, or {@link
  - * Entry#withRandomId}. The exception is when an existing key which has an id requirement is
  - * imported (in which case the required ID is used).
  + * a new entry by calling one of {@link Entry#withFixedId} or {@link Entry#withRandomId}. The
  + * exception is when an existing key which has an id requirement is imported (in which case the
  + * required ID is used).
  *
  * <p>It is possible to set the status of an entry by calling {@link Entry#setStatus}. The Status
  * defaults to {@code ENABLED}.
  @@ -360,8 +360,6 @@ public final class KeysetHandle {
  * withRandomId}-entry
  * <li>There are two entries with the same {@code withFixedId} (including pre-existing keys
  * and imported keys which have an id requirement).
  - * <li>There is a {@code withNextId} entry, but there previously was an entry which has an ID
  - * of {@code MAX_INTEGER}.
  * </ul>
  */
  public KeysetHandle build() throws GeneralSecurityException {
  @@ -528,8 +526,8 @@ public final class KeysetHandle {
  * Creates a new entry with a fixed key.
  *
  * <p>If the Key has an IdRequirement, the default will be fixed to this ID. Otherwise, the user
  - * has to specify the ID to be used and call one of {@code withFixedId(i)}, {@code
  - * withRandomId()}, or {@code withNextId()} should on the returned entry.
  + * has to specify the ID to be used and call one of {@code withFixedId(i)} or {@code
  + * withRandomId()} on the returned entry.
  */
  public static KeysetHandle.Builder.Entry importKey(Key key) {
  KeysetHandle.Builder.Entry importedEntry = new KeysetHandle.Builder.Entry(key);
  