UnityEditor.Audio.AudioMixerGroupController.GetGUIDForPitch C# (CSharp) Method

        public extern GUID GetGUIDForPitch();
        [MethodImpl(MethodImplOptions.InternalCall)]

        private AudioMixerGroupController DuplicateGroupRecurse(AudioMixerGroupController sourceGroup, bool recordUndo)
        {
            var targetGroup = new AudioMixerGroupController(this);

            // Copy effects
            var targetEffectsList = new List <AudioMixerEffectController>();

            foreach (var sourceEffect in sourceGroup.effects)
            {
                targetEffectsList.Add(CopyEffect(sourceEffect));
            }

            // Copy child groups
            var targetChildren = new List <AudioMixerGroupController>();

            foreach (var childGroup in sourceGroup.children)
            {
                targetChildren.Add(DuplicateGroupRecurse(childGroup, recordUndo));
            }

            targetGroup.name = sourceGroup.name + " - Copy";
            targetGroup.PreallocateGUIDs();
            targetGroup.effects       = targetEffectsList.ToArray();
            targetGroup.children      = targetChildren.ToArray();
            targetGroup.solo          = sourceGroup.solo;
            targetGroup.mute          = sourceGroup.mute;
            targetGroup.bypassEffects = sourceGroup.bypassEffects;
            float value;

            foreach (var s in snapshots)
            {
                if (s.GetValue(sourceGroup.GetGUIDForVolume(), out value))
                {
                    s.SetValue(targetGroup.GetGUIDForVolume(), value);
                }
                if (s.GetValue(sourceGroup.GetGUIDForPitch(), out value))
                {
                    s.SetValue(targetGroup.GetGUIDForPitch(), value);
                }
                if (s.GetValue(sourceGroup.GetGUIDForSend(), out value))
                {
                    s.SetValue(targetGroup.GetGUIDForSend(), value);
                }
            }

            AssetDatabase.AddObjectToAsset(targetGroup, this);

            if (recordUndo)
            {
                Undo.RegisterCreatedObjectUndo(targetGroup, targetGroup.name);
            }

            // Add to view if source is shown (so it's visible in the channelstrip)
            if (CurrentViewContainsGroup(sourceGroup.groupID))
            {
                targetGroup.controller.AddGroupToCurrentView(targetGroup);
            }

            return(targetGroup);
        }