Error With Editing Post-Processing Stack Through Script

I am trying to edit postprocessing through script. I am following [this][1] tutorial and apparently the header file `using UnityEngine.Rendering.PostProcessing;` doesn't exist even though all the sources use it. Is this depreciated or legacy code? If not, then could somebody point out my error please. Thank you in advance!

(BTW HERES WHAT I TRIED!) using UnityEngine.Rendering.PostProcessing; using UnityEngine; public class VisualsManager : MonoBehaviour { public PostProcessVolume volume; private Bloom _Bloom; void Start() { volume.profile.TryGetSettings(out _Bloom); _Bloom.intensity.value = 0; } } [1]: +https://www.youtube.com/watch?v=jg2I2odw51M