please include function javaParser_makeAllPublic.
please include function javaParseCompilationUnit.

static S javaParser_makeAllPublic_keepComments(S src) {
  //CompilationUnit cu = javaParseCompilationUnit(src);
  CompilationUnit cu = JavaParser.parse(src);
  new PrettyPrinterConfiguration ppconf;
  ppconf.setIndent("  ");
  ret cu.toString(ppconf);
}