Flattening a form
Examples written in answer to questions such as:
checkboxflatten
##GITHUB:https://github.com/itext/itext-publications-examples-java/blob/master/src/main/java/com/itextpdf/samples/sandbox/acroforms/CheckBoxFlatten.java##
##GITHUB:https://github.com/itext/itext-publications-samples-dotnet/blob/master/itext/itext.samples/itext/samples/sandbox/acroforms/CheckBoxFlatten.cs##