code: package org.eclipse.milo.opcua.sdk.client.model.types.objects;
  
  import java.util.concurrent.CompletableFuture;
  
  import org.eclipse.milo.opcua.sdk.client.model.types.variables.PropertyType;
  import org.eclipse.milo.opcua.sdk.core.QualifiedProperty;
  import org.eclipse.milo.opcua.sdk.core.ValueRanks;
  import org.eclipse.milo.opcua.stack.core.UaException;
  import org.eclipse.milo.opcua.stack.core.types.builtin.DataValue;
  import org.eclipse.milo.opcua.stack.core.types.builtin.DateTime;
  import org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId;
  import org.eclipse.milo.opcua.stack.core.types.builtin.StatusCode;
  
  public interface AuditHistoryAtTimeDeleteEventType extends AuditHistoryDeleteEventType {
      QualifiedProperty<DateTime[]> REQ_TIMES = new QualifiedProperty<>(
          "http://opcfoundation.org/UA/",
          "ReqTimes",
          ExpandedNodeId.parse("nsu=http://opcfoundation.org/UA/;i=294"),
          ValueRanks.OneDimension,
          DateTime[].class
      );
  
      QualifiedProperty<DataValue[]> OLD_VALUES = new QualifiedProperty<>(
          "http://opcfoundation.org/UA/",
          "OldValues",
          ExpandedNodeId.parse("nsu=http://opcfoundation.org/UA/;i=23"),
          ValueRanks.OneDimension,
          DataValue[].class
      );
  
      /**
       * Get the local value of the ReqTimes Node.
       * <p>
       * The returned value is the last seen; it is not read live from the server.
       *
       * @return the local value of the ReqTimes Node.
       * @throws UaException if an error occurs creating or getting the ReqTimes Node.
       */
      DateTime[] getReqTimes() throws UaException;
  
      /**
       * Set the local value of the ReqTimes Node.
       * <p>
       * The value is only updated locally; it is not written to the server.
       *
       * @param reqTimes the local value to set for the ReqTimes Node.
       * @throws UaException if an error occurs creating or getting the ReqTimes Node.
       */
      void setReqTimes(DateTime[] reqTimes) throws UaException;
  
      /**
       * Read the value of the ReqTimes Node from the server and update the local value if the
       * operation succeeds.
       *
       * @return the {@link DateTime[]} value read from the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      DateTime[] readReqTimes() throws UaException;
  
      /**
       * Write a new value for the ReqTimes Node to the server and update the local value if
       * the operation succeeds.
       *
       * @param reqTimes the {@link DateTime[]} value to write to the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      void writeReqTimes(DateTime[] reqTimes) throws UaException;
  
      /**
       * An asynchronous implementation of {@link #readReqTimes()}.
       *
       * @return a CompletableFuture that completes successfully with the property value or completes
       * exceptionally if an operation- or service-level error occurs.
       */
      CompletableFuture<? extends DateTime[]> readReqTimesAsync();
  
      /**
       * An asynchronous implementation of {@link #writeReqTimes(DateTime[])}.
       *
       * @return a CompletableFuture that completes successfully with the operation result or
       * completes exceptionally if a service-level error occurs.
       */
      CompletableFuture<StatusCode> writeReqTimesAsync(DateTime[] reqTimes);
  
      /**
       * Get the ReqTimes {@link PropertyType} Node, or {@code null} if it does not exist.
       * <p>
       * The Node is created when first accessed and cached for subsequent calls.
       *
       * @return the ReqTimes {@link PropertyType} Node, or {@code null} if it does not exist.
       * @throws UaException if an error occurs creating or getting the Node.
       */
      PropertyType getReqTimesNode() throws UaException;
  
      /**
       * Asynchronous implementation of {@link #getReqTimesNode()}.
       *
       * @return a CompletableFuture that completes successfully with the
       * ? extends PropertyType Node or completes exceptionally if an error occurs
       * creating or getting the Node.
       */
      CompletableFuture<? extends PropertyType> getReqTimesNodeAsync();
  
      /**
       * Get the local value of the OldValues Node.
       * <p>
       * The returned value is the last seen; it is not read live from the server.
       *
       * @return the local value of the OldValues Node.
       * @throws UaException if an error occurs creating or getting the OldValues Node.
       */
      DataValue[] getOldValues() throws UaException;
  
      /**
       * Set the local value of the OldValues Node.
       * <p>
       * The value is only updated locally; it is not written to the server.
       *
       * @param oldValues the local value to set for the OldValues Node.
       * @throws UaException if an error occurs creating or getting the OldValues Node.
       */
      void setOldValues(DataValue[] oldValues) throws UaException;
  
      /**
       * Read the value of the OldValues Node from the server and update the local value if the
       * operation succeeds.
       *
       * @return the {@link DataValue[]} value read from the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      DataValue[] readOldValues() throws UaException;
  
      /**
       * Write a new value for the OldValues Node to the server and update the local value if
       * the operation succeeds.
       *
       * @param oldValues the {@link DataValue[]} value to write to the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      void writeOldValues(DataValue[] oldValues) throws UaException;
  
      /**
       * An asynchronous implementation of {@link #readOldValues()}.
       *
       * @return a CompletableFuture that completes successfully with the property value or completes
       * exceptionally if an operation- or service-level error occurs.
       */
      CompletableFuture<? extends DataValue[]> readOldValuesAsync();
  
      /**
       * An asynchronous implementation of {@link #writeOldValues(DataValue[])}.
       *
       * @return a CompletableFuture that completes successfully with the operation result or
       * completes exceptionally if a service-level error occurs.
       */
      CompletableFuture<StatusCode> writeOldValuesAsync(DataValue[] oldValues);
  
      /**
       * Get the OldValues {@link PropertyType} Node, or {@code null} if it does not exist.
       * <p>
       * The Node is created when first accessed and cached for subsequent calls.
       *
       * @return the OldValues {@link PropertyType} Node, or {@code null} if it does not exist.
       * @throws UaException if an error occurs creating or getting the Node.
       */
      PropertyType getOldValuesNode() throws UaException;
  
      /**
       * Asynchronous implementation of {@link #getOldValuesNode()}.
       *
       * @return a CompletableFuture that completes successfully with the
       * ? extends PropertyType Node or completes exceptionally if an error occurs
       * creating or getting the Node.
       */
      CompletableFuture<? extends PropertyType> getOldValuesNodeAsync();
  }
  