UnityEditor.EditorUtility.WarnPrefab C# (CSharp) Method

        public static extern bool WarnPrefab(Object target, string title, string warning, string okButton);
        [MethodImpl(MethodImplOptions.InternalCall)]

        private bool CheckIfChild(Object subEmitter)
        {
            ParticleSystem root = ParticleSystemEditorUtils.GetRoot(m_ParticleSystemUI.m_ParticleSystems[0]);
            ParticleSystem ps   = subEmitter as ParticleSystem;

            if (IsChild(ps, root))
            {
                return(true);
            }

            if (PrefabUtility.IsPartOfAnyPrefab(ps.gameObject) && !PrefabUtility.IsAnyPrefabInstanceRoot(ps.gameObject))
            {
                string kPrefabReparentWarn = $"The assigned sub emitter is not part of the current effect because it is not a child of the current root Particle System GameObject: '{root.gameObject.name}'. The Particle System cannot be moved because it is a child of a Prefab instance.";
                EditorUtility.WarnPrefab(ps.gameObject, "Reparent GameObjects", kPrefabReparentWarn, "OK");
                return(false);
            }

            string kReparentText = string.Format("The assigned sub emitter is not a child of the current root particle system GameObject: '{0}' and is therefore NOT considered a part of the current effect. Do you want to reparent it?", root.gameObject.name);

            if (EditorUtility.DisplayDialog(
                    "Reparent GameObjects",
                    kReparentText,
                    "Yes, Reparent",
                    "No, Remove"))
            {
                if (EditorUtility.IsPersistent(subEmitter))
                {
                    var newGo = Object.Instantiate(subEmitter) as GameObject;
                    if (newGo != null)
                    {
                        newGo.transform.parent        = m_ParticleSystemUI.m_ParticleSystems[0].transform;
                        newGo.transform.localPosition = Vector3.zero;
                        newGo.transform.localRotation = Quaternion.identity;
                    }
                }
                else
                {
                    if (ps != null)
                    {
                        Undo.SetTransformParent(ps.gameObject.transform.transform, m_ParticleSystemUI.m_ParticleSystems[0].transform, "Reparent sub emitter");
                    }
                }

                return(true);
            }
            else if (ps != null)
            {
                // Clear sub-emitters that have been deselected, to avoid having their particles left paused in the Scene View (case 946999)
                ps.Clear(true);
            }

            return(false);
        }