code: package org.eclipse.milo.opcua.sdk.client.model.types.variables;
  
  import java.util.concurrent.CompletableFuture;
  
  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.ExpandedNodeId;
  import org.eclipse.milo.opcua.stack.core.types.builtin.LocalizedText;
  import org.eclipse.milo.opcua.stack.core.types.builtin.QualifiedName;
  import org.eclipse.milo.opcua.stack.core.types.builtin.StatusCode;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UInteger;
  
  public interface StateVariableType extends BaseDataVariableType {
      QualifiedProperty<Object> ID = new QualifiedProperty<>(
          "http://opcfoundation.org/UA/",
          "Id",
          ExpandedNodeId.parse("nsu=http://opcfoundation.org/UA/;i=24"),
          ValueRanks.Scalar,
          Object.class
      );
  
      QualifiedProperty<QualifiedName> NAME = new QualifiedProperty<>(
          "http://opcfoundation.org/UA/",
          "Name",
          ExpandedNodeId.parse("nsu=http://opcfoundation.org/UA/;i=20"),
          ValueRanks.Scalar,
          QualifiedName.class
      );
  
      QualifiedProperty<UInteger> NUMBER = new QualifiedProperty<>(
          "http://opcfoundation.org/UA/",
          "Number",
          ExpandedNodeId.parse("nsu=http://opcfoundation.org/UA/;i=7"),
          ValueRanks.Scalar,
          UInteger.class
      );
  
      QualifiedProperty<LocalizedText> EFFECTIVE_DISPLAY_NAME = new QualifiedProperty<>(
          "http://opcfoundation.org/UA/",
          "EffectiveDisplayName",
          ExpandedNodeId.parse("nsu=http://opcfoundation.org/UA/;i=21"),
          ValueRanks.Scalar,
          LocalizedText.class
      );
  
      /**
       * Get the local value of the Id Node.
       * <p>
       * The returned value is the last seen; it is not read live from the server.
       *
       * @return the local value of the Id Node.
       * @throws UaException if an error occurs creating or getting the Id Node.
       */
      Object getId() throws UaException;
  
      /**
       * Set the local value of the Id Node.
       * <p>
       * The value is only updated locally; it is not written to the server.
       *
       * @param id the local value to set for the Id Node.
       * @throws UaException if an error occurs creating or getting the Id Node.
       */
      void setId(Object id) throws UaException;
  
      /**
       * Read the value of the Id Node from the server and update the local value if the
       * operation succeeds.
       *
       * @return the {@link Object} value read from the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      Object readId() throws UaException;
  
      /**
       * Write a new value for the Id Node to the server and update the local value if
       * the operation succeeds.
       *
       * @param id the {@link Object} value to write to the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      void writeId(Object id) throws UaException;
  
      /**
       * An asynchronous implementation of {@link #readId()}.
       *
       * @return a CompletableFuture that completes successfully with the property value or completes
       * exceptionally if an operation- or service-level error occurs.
       */
      CompletableFuture<?> readIdAsync();
  
      /**
       * An asynchronous implementation of {@link #writeId(Object)}.
       *
       * @return a CompletableFuture that completes successfully with the operation result or
       * completes exceptionally if a service-level error occurs.
       */
      CompletableFuture<StatusCode> writeIdAsync(Object id);
  
      /**
       * Get the Id {@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 Id {@link PropertyType} Node, or {@code null} if it does not exist.
       * @throws UaException if an error occurs creating or getting the Node.
       */
      PropertyType getIdNode() throws UaException;
  
      /**
       * Asynchronous implementation of {@link #getIdNode()}.
       *
       * @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> getIdNodeAsync();
  
      /**
       * Get the local value of the Name Node.
       * <p>
       * The returned value is the last seen; it is not read live from the server.
       *
       * @return the local value of the Name Node.
       * @throws UaException if an error occurs creating or getting the Name Node.
       */
      QualifiedName getName() throws UaException;
  
      /**
       * Set the local value of the Name Node.
       * <p>
       * The value is only updated locally; it is not written to the server.
       *
       * @param name the local value to set for the Name Node.
       * @throws UaException if an error occurs creating or getting the Name Node.
       */
      void setName(QualifiedName name) throws UaException;
  
      /**
       * Read the value of the Name Node from the server and update the local value if the
       * operation succeeds.
       *
       * @return the {@link QualifiedName} value read from the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      QualifiedName readName() throws UaException;
  
      /**
       * Write a new value for the Name Node to the server and update the local value if
       * the operation succeeds.
       *
       * @param name the {@link QualifiedName} value to write to the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      void writeName(QualifiedName name) throws UaException;
  
      /**
       * An asynchronous implementation of {@link #readName()}.
       *
       * @return a CompletableFuture that completes successfully with the property value or completes
       * exceptionally if an operation- or service-level error occurs.
       */
      CompletableFuture<? extends QualifiedName> readNameAsync();
  
      /**
       * An asynchronous implementation of {@link #writeName(QualifiedName)}.
       *
       * @return a CompletableFuture that completes successfully with the operation result or
       * completes exceptionally if a service-level error occurs.
       */
      CompletableFuture<StatusCode> writeNameAsync(QualifiedName name);
  
      /**
       * Get the Name {@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 Name {@link PropertyType} Node, or {@code null} if it does not exist.
       * @throws UaException if an error occurs creating or getting the Node.
       */
      PropertyType getNameNode() throws UaException;
  
      /**
       * Asynchronous implementation of {@link #getNameNode()}.
       *
       * @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> getNameNodeAsync();
  
      /**
       * Get the local value of the Number Node.
       * <p>
       * The returned value is the last seen; it is not read live from the server.
       *
       * @return the local value of the Number Node.
       * @throws UaException if an error occurs creating or getting the Number Node.
       */
      UInteger getNumber() throws UaException;
  
      /**
       * Set the local value of the Number Node.
       * <p>
       * The value is only updated locally; it is not written to the server.
       *
       * @param number the local value to set for the Number Node.
       * @throws UaException if an error occurs creating or getting the Number Node.
       */
      void setNumber(UInteger number) throws UaException;
  
      /**
       * Read the value of the Number Node from the server and update the local value if the
       * operation succeeds.
       *
       * @return the {@link UInteger} value read from the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      UInteger readNumber() throws UaException;
  
      /**
       * Write a new value for the Number Node to the server and update the local value if
       * the operation succeeds.
       *
       * @param number the {@link UInteger} value to write to the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      void writeNumber(UInteger number) throws UaException;
  
      /**
       * An asynchronous implementation of {@link #readNumber()}.
       *
       * @return a CompletableFuture that completes successfully with the property value or completes
       * exceptionally if an operation- or service-level error occurs.
       */
      CompletableFuture<? extends UInteger> readNumberAsync();
  
      /**
       * An asynchronous implementation of {@link #writeNumber(UInteger)}.
       *
       * @return a CompletableFuture that completes successfully with the operation result or
       * completes exceptionally if a service-level error occurs.
       */
      CompletableFuture<StatusCode> writeNumberAsync(UInteger number);
  
      /**
       * Get the Number {@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 Number {@link PropertyType} Node, or {@code null} if it does not exist.
       * @throws UaException if an error occurs creating or getting the Node.
       */
      PropertyType getNumberNode() throws UaException;
  
      /**
       * Asynchronous implementation of {@link #getNumberNode()}.
       *
       * @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> getNumberNodeAsync();
  
      /**
       * Get the local value of the EffectiveDisplayName Node.
       * <p>
       * The returned value is the last seen; it is not read live from the server.
       *
       * @return the local value of the EffectiveDisplayName Node.
       * @throws UaException if an error occurs creating or getting the EffectiveDisplayName Node.
       */
      LocalizedText getEffectiveDisplayName() throws UaException;
  
      /**
       * Set the local value of the EffectiveDisplayName Node.
       * <p>
       * The value is only updated locally; it is not written to the server.
       *
       * @param effectiveDisplayName the local value to set for the EffectiveDisplayName Node.
       * @throws UaException if an error occurs creating or getting the EffectiveDisplayName Node.
       */
      void setEffectiveDisplayName(LocalizedText effectiveDisplayName) throws UaException;
  
      /**
       * Read the value of the EffectiveDisplayName Node from the server and update the local value if the
       * operation succeeds.
       *
       * @return the {@link LocalizedText} value read from the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      LocalizedText readEffectiveDisplayName() throws UaException;
  
      /**
       * Write a new value for the EffectiveDisplayName Node to the server and update the local value if
       * the operation succeeds.
       *
       * @param effectiveDisplayName the {@link LocalizedText} value to write to the server.
       * @throws UaException if a service- or operation-level error occurs.
       */
      void writeEffectiveDisplayName(LocalizedText effectiveDisplayName) throws UaException;
  
      /**
       * An asynchronous implementation of {@link #readEffectiveDisplayName()}.
       *
       * @return a CompletableFuture that completes successfully with the property value or completes
       * exceptionally if an operation- or service-level error occurs.
       */
      CompletableFuture<? extends LocalizedText> readEffectiveDisplayNameAsync();
  
      /**
       * An asynchronous implementation of {@link #writeEffectiveDisplayName(LocalizedText)}.
       *
       * @return a CompletableFuture that completes successfully with the operation result or
       * completes exceptionally if a service-level error occurs.
       */
      CompletableFuture<StatusCode> writeEffectiveDisplayNameAsync(LocalizedText effectiveDisplayName);
  
      /**
       * Get the EffectiveDisplayName {@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 EffectiveDisplayName {@link PropertyType} Node, or {@code null} if it does not exist.
       * @throws UaException if an error occurs creating or getting the Node.
       */
      PropertyType getEffectiveDisplayNameNode() throws UaException;
  
      /**
       * Asynchronous implementation of {@link #getEffectiveDisplayNameNode()}.
       *
       * @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> getEffectiveDisplayNameNodeAsync();
  }
  