public PdfRectangle(PdfContentByte content, PdfDocument pdfDocument, IPageElement rectangle) : base(content, pdfDocument, rectangle)
 {
 }
 protected BaseElement(PdfContentByte pdfContent, PdfDocument document, IPageElement element)
 {
     _pdfContent = pdfContent;
     _document   = document;
     _element    = element as T;
 }