@Override
  protected AbstractNotificationOperation getNextOperation(final IWsdlModelRoot modelRoot)
      throws Exception {
    if (inlineNSCommand == null) {
      final ISchema containingSchema = findSingleSchema(modelRoot, "http://namespace1");
      final Collection<ISchema> allReferredSchemas = containingSchema.getAllReferredSchemas();
      ISchema schemaToInline = null;
      for (final ISchema iSchema : allReferredSchemas) {
        if (XSD1_NS.equals(iSchema.getNamespace())) {
          schemaToInline = iSchema;
          break;
        }
      }
      inlineNSCommand = new InlineNamespaceCompositeCommand(modelRoot, schemaToInline);
      return inlineNSCommand;
    }
    if (setTypeCommand == null) {
      final IElement attribute =
          getStructureType3(modelRoot).getElements("Attribute2").iterator().next();

      final ISchema schema2 = findSingleSchema(modelRoot, "http://namespace3");
      final IType typeToBeSet = schema2.getType(false, "SimpleType2");
      setTypeCommand = new SetElementTypeCommand(attribute, typeToBeSet);
      return setTypeCommand;
    }
    return null;
  }
  /**
   * Checks modelObject.getModelRoot() referred schemas, do match modelObject's XSDSchema
   *
   * @param modelObject which is supposed to be from referred schema.
   * @return referred ISchema, or null
   */
  public static ISchema getReferredSchema(final IModelObject modelObject) {
    if (modelObject == null || !(modelObject.getModelRoot() instanceof IXSDModelRoot)) {
      return null;
    }

    final IXSDModelRoot xsdModelRoot = (IXSDModelRoot) modelObject.getModelRoot();
    final ISchema schema = xsdModelRoot.getSchema();

    // get referred XSDSchema
    EObject referredXSDSchema = modelObject.getComponent();
    while (referredXSDSchema != null && !(referredXSDSchema instanceof XSDSchema)) {
      referredXSDSchema = referredXSDSchema.eContainer();
    }

    if (referredXSDSchema != null) {
      for (final ISchema referredSchema : schema.getAllReferredSchemas()) {
        if (referredXSDSchema.equals(referredSchema.getComponent())) {
          return referredSchema;
        }
      }
    }
    return null;
  }