title: Drag multiple items inside another item in d3
body: <p>I have three circles in a rectangle. Whenever I drag the rectangle all three circles should move with my rectangle. However, whenever I move one of the circles that specific circle should move. Other circles and rectangle should not move. </p>
  
  <p><a href="https://i.stack.imgur.com/rDiq4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rDiq4.png" alt="enter image description here"></a></p>
  
  <p>I have no idea where should I start from. I know how to drag a single circle or multiple circles but no idea how to do this. Any idea?</p>