UnityEditor.HorizontalLayout.DoLayout C# (CSharp) Method

        public static IDisposable DoLayout()
        {
            GUILayout.BeginHorizontal(new GUILayoutOption[0]);
            return instance;
        }

        public void OnGUI()
        {
            var e     = Event.current;
            var close = false;
            var enter = false;

            if (e.type == EventType.KeyDown)
            {
                close = (e.keyCode == KeyCode.Escape);
                enter = ((e.keyCode == KeyCode.Return) || (e.keyCode == KeyCode.KeypadEnter));
            }

            using (HorizontalLayout.DoLayout())
            {
                GUILayout.Space(kSpace * 2);

                using (VerticalLayout.DoLayout())
                {
                    GUILayout.FlexibleSpace();

                    using (HorizontalLayout.DoLayout())
                    {
                        GUILayout.Label(EditorGUIUtility.TrTextContent("Password", "Certificate password."), kLabelWidth);
                        GUI.SetNextControlName(kPasswordId);
                        password = GUILayout.PasswordField(password, kPasswordChar);
                    }

                    GUILayout.Space(kSpace * 2);

                    using (HorizontalLayout.DoLayout())
                    {
                        GUILayout.Label(message, messageStyle);

                        GUILayout.FlexibleSpace();

                        if (GUILayout.Button(EditorGUIUtility.TrTextContent("Ok"), kButtonWidth) || enter)
                        {
                            message = GUIContent.none;

                            try
                            {
                                if (PlayerSettings.WSA.SetCertificate(path, password))
                                {
                                    close = true;
                                }
                                else
                                {
                                    message = EditorGUIUtility.TrTextContent("Invalid password.");
                                }
                            }
                            catch (UnityException ex)
                            {
                                Debug.LogError(ex.Message);
                            }
                        }
                    }

                    GUILayout.FlexibleSpace();
                }

                GUILayout.Space(kSpace * 2);
            }

            if (close)
            {
                Close();
            }
            else if (focus != null)
            {
                EditorGUI.FocusTextInControl(focus);
                focus = null;
            }
        }