UnityEditor.SceneView.CallOnPreSceneGUI C# (CSharp) Method

        private void CallOnPreSceneGUI()
        {
            foreach (Editor editor in this.GetActiveEditors())
            {
                Handles.matrix = Matrix4x4.identity;
                Component target = editor.target as Component;
                if ((target == null) || target.gameObject.activeInHierarchy)
                {
                    MethodInfo method = editor.GetType().GetMethod("OnPreSceneGUI", BindingFlags.FlattenHierarchy | BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
                    if (method != null)
                    {
                        Editor.m_AllowMultiObjectAccess = true;
                        for (int i = 0; i < editor.targets.Length; i++)
                        {
                            editor.referenceTargetIndex = i;
                            Editor.m_AllowMultiObjectAccess = !editor.canEditMultipleObjects;
                            method.Invoke(editor, null);
                            Editor.m_AllowMultiObjectAccess = true;
                        }
                    }
                }
            }
            if (onPreSceneGUIDelegate != null)
            {
                onPreSceneGUIDelegate(this);
            }
            Handles.matrix = Matrix4x4.identity;
        }