Entity E1 has E2,E3 {
  field E2 e2;
  field E3 e3;
  operation void foo() {
    e2.bar();
  }
}

Entity E2 {
  field E1 parent;
  operation void bar() {
    parent.e3.baz();
  }
}

Entity E3 {
  field E1 parent;
  operation void baz() {
    System.out.println("test");
  }
}

public class E1 {
  public E2 e2;
  public E3 e3;
 
  pubic E1(){ initialize(); }

  private void initialize(){
   this.e2 = new E2(this);
   this.e3 = new E3(this);
  }

  public void foo(){
    e2.bar();
  }
}

public class E2 {
  public E1 parent;
  public E2(E1 parent){
    this.parent = parent;
  }
  public void bar(){
    parent.e3.baz();
  }
}

public class E3 {
  public E1 parent;
  public E3(E1 parent){
    this.parent = parent;
  }
  public void baz(){
    System.out.println("test");
  }
}

public JvmGenericType toClass(/* @Nullable */ EObject sourceElement, /* @Nullable */ QualifiedName name, /* @Nullable */ Procedure1<? super JvmGenericType> initializer) {
		return toClass(sourceElement, name != null ? name.toString() : null, initializer);
	}
	
	public JvmGenericType toClass(/* @Nullable */ EObject sourceElement, /* @Nullable */ String name, /* @Nullable */ Procedure1<? super JvmGenericType> initializer) {
		final JvmGenericType result = createJvmGenericType(sourceElement, name);
		if (result == null)
			return null;
		associate(sourceElement, result);
		return initializeSafely(result, initializer);
	}