UnityEditor.MaterialEditor.LightmapEmissionProperty C# (CSharp) Method

        public void LightmapEmissionProperty()
        {
            this.LightmapEmissionProperty(0);
        }

 public override void OnGUI(MaterialEditor materialEditor, MaterialProperty[] props)
 {
   base.OnGUI(materialEditor, props);
   materialEditor.LightmapEmissionProperty(0);
   foreach (Material target in materialEditor.targets)
     target.globalIlluminationFlags &= ~MaterialGlobalIlluminationFlags.EmissiveIsBlack;
 }