addMultiple(children, silent) → {Array.<DisplayObject> | Phaser.Group}
Adds an array of existing Display Objects to this Group. The Display Objects are automatically added to the top of this Group, and will render on-top of everything already in this Group. As well as an array you can also pass another Group as the first argument. In this case all of the children from thatGroup will be removed from it and added into this Group. If Group.enableBody is set, then a physics body will be cre