LayoutFarm.Text.EditableTextLine.AddBefore C# (CSharp) Method

        public void AddBefore(EditableRun beforeVisualElement, EditableRun v)
        {
            if (!v.IsLineBreak)
            {
                AddNormalRunBefore(beforeVisualElement, v);
            }
            else
            {
                AddLineBreakBefore(beforeVisualElement);
            }
        }
        public void AddAfter(EditableRun afterVisualElement, EditableRun v)

        public void AddBefore(EditableRun beforeVisualElement, EditableRun visualElement)
        {
            EditableTextLine targetLine = beforeVisualElement.OwnerEditableLine;

            if (targetLine != null)
            {
                targetLine.AddBefore(beforeVisualElement, visualElement);
            }
            else
            {
                throw new NotSupportedException();
            }
        }