UnityEditor.MaterialEditor.OnPreviewGUI C# (CSharp) Method

        public override void OnPreviewGUI(Rect r, GUIStyle background)
        {
            if (this.m_CustomShaderGUI != null)
            {
                this.m_CustomShaderGUI.OnMaterialPreviewGUI(this, r, background);
            }
            else
            {
                this.DefaultPreviewGUI(r, background);
            }
        }