Returns the image URL of the watermark in the document.
This method doesn't have any parameters.
builder.CreateFile("docx");
var oDocument = Api.GetDocument();
oDocument.InsertWatermark("Watermark");
var oSettings = oDocument.GetWatermarkSettings();
oSettings.SetType("image");
oSettings.SetImageURL("https://api.onlyoffice.com/content/img/docbuilder/examples/onlyoffice_logo.png");
oSettings.SetImageSize(100 * 36000, 100 * 36000);
oDocument.SetWatermarkSettings(oSettings);
var sImage = oSettings.GetImageURL();
var oParagraph = oDocument.GetElement(0);
oParagraph.AddText("Watermark image URL: "+ sImage);
builder.SaveFile("docx", "GetImageURL.docx");
builder.CloseFile();