package xuml.tools.model.compiler.runtime.query;
   
   import xuml.tools.model.compiler.runtime.Entity;
   
   public class IsNullString<T extends Entity<T>> extends StringExpression<T> {
   
       private final StringExpression<T> e;
   
       public IsNullString(StringExpression<T> e) {
          this.e = e;
      }
  
      public StringExpression<T> getExpression() {
          return e;
      }
  }