*/
public void importRtfFragment(Reader documentSource, RtfImportMappings mappings) throws IOException, DocumentException {
if(!this.open) {
throw new DocumentException("The document must be open to import RTF fragments.");
}
RtfParser rtfImport = new RtfParser();
rtfImport.importRtfFragment(documentSource, this.rtfDoc, mappings);
}