Enable and Disable Cesium User Input in Unity

In the previous tutorial, we implemented 3D photorealistic tiles in Unity using Cesium and Google Maps APIs. We also implemented an address search user interface. However, I don’t like that the 3D scene keeps orbiting every time I move the mouse, even when I do not intend to rotate the scene. To resolve this issue, I can enable the user input that controls the Cesium camera only when a certain key is pressed, the Shift key, for example. In other cases, when the user is not holding the shift key, the camera will not move around when I move the mouse.