Inclusion an Object in another to drag it as one object

Questions
,
1

Hi All,

I want to include an Object in another to drag it as one object.

    
    dragControls = new DragControls(allObjects, camera, renderer.domElement);
    dragControls.transformGroup = true;
   loader.load("/obj/objects/HB-2.obj", function (object) {
  
 
    object.rotation.x = Math.PI * 2;

    object.name = "Handler";
    object.userData.name = objName;

    for (let index = 0; index < object.children.length; index++) {
      object.children[index].userData.uuid = object.uuid;
      object.children[index].material.map = textureWalls;
      object.children[index].castShadow = true;
      object.children[index].receiveShadow = true;
      Objobject.children.push(object.children[index]);
    }
    
    for (const child of Objobject.children) {
      if (child.isMesh) child.material = child.material.clone();
    }

    allObjects.push(Objobject);
    scene.add(Objobject);