public Control getControl(int index) {
        return controls.get(index);
    }
Returns the control at the given index in the list.

@param index The index of the control in the list to find.
@return The control at the given index.

@throws IndexOutOfBoundsException
     If the index is outside the range [0, getNumControls()-1]

@see Spatial#addControl(com.jme3.scene.control.Control)
jme3-core/src/main/java/com/jme3/scene/Spatial.java