public ApacheFOPServerlessPdfRenderService(XDocument xslFODoc, ApacheFOPServerlessXslFORenderOptions apacheFopServerlessXslFoPdfRenderOptions)
     : this(
         xslFODoc.AssertArgumentIsNotNull(nameof(xslFODoc), "Valid XSL-FO Xml source document must be specified.").ToString(),
         apacheFopServerlessXslFoPdfRenderOptions
         )
 {
 }
 public ApacheFOPServerlessPdfRenderService(string xslfoContent, ApacheFOPServerlessXslFORenderOptions apacheFopServerlessXslFoPdfRenderOptions)
 {
     this.XslFOContent = xslfoContent.AssertArgumentIsNotNullOrBlank(nameof(xslfoContent), "Valid XSL-FO Xml source document must be specified.");
     this.Options      = apacheFopServerlessXslFoPdfRenderOptions.AssertArgumentIsNotNull(nameof(apacheFopServerlessXslFoPdfRenderOptions), "XSL-FO Render options must be specified.");
 }