public boolean isIfXFAExtractOnlyXFA() {
        return ifXFAExtractOnlyXFA;
    }
@return how to handle XFA data if it exists
@see #setIfXFAExtractOnlyXFA(boolean)
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/main/java/org/apache/tika/parser/pdf/PDFParserConfig.java