api/src/main/java/org/ocpsoft/rewrite/config/RuleBuilder.java
public DefaultOperationBuilder getOperationBuilder()
   {
      if (operation == null)
         operation = Operations.create();
      else if (!(operation instanceof DefaultOperationBuilder))
         operation = Operations.wrap(operation);

      return (DefaultOperationBuilder) operation;
   }
public DefaultOperationBuilder getOperationBuilder()
   {
      if (operation == null)
         operation = Operations.create();
      else if (!(operation instanceof DefaultOperationBuilder))
         operation = Operations.wrap(operation);

      return (DefaultOperationBuilder) operation;
   }
Return the underlying {@link OperationBuilder}