How to use different versions of javac api in netbeans sources

[Jakub Herkel]

Hi,

I checked this issue https://issues.apache.org/jira/browse/NETBEANS-1309.
This issue is about a new javadoc @summary tag and that Netbeans doesn't
display any summary when this tag is used in javadoc popup.
I debugged source code and, if I am correct, data for this javadoc popup
are generated in ElementJavadoc class (Java Source UI module). There is a
code :
 for (DocTree tag : tags) {
            switch (tag.getKind()) {
                case REFERENCE:
                    ReferenceTree refTag = (ReferenceTree)tag;
                    appendReference(sb, refTag, null, docPath, doc, trees);
                    break;
...
 case TEXT:
                    TextTree ttag = (TextTree)tag;
                    sb.append(ttag.getBody());
            }

These tags are parts of Java Compiler API. So for Java 10+ there is a new
SUMMARY tag.
But as far as I know Netbeans is compiled with Java 8, so I don't have
access to it. Is there a way how I can use a newer version of Java Compiler
API with Netbeans? Or any hint of what I can do in this issue?

Jakub