code: public void visitExport(String packaze, int access, String... modules) {
          if (mv != null) {
              mv.visitExport(packaze, access, modules);
          }
      }
docs: Visit an exported package of the current module.
  
  @param packaze the qualified name of the exported package.
  @param access the access flag of the exported package,
  valid values are among {@code ACC_SYNTHETIC} and
  {@code ACC_MANDATED}.
  @param modules the qualified names of the modules that can access to
  the public classes of the exported package or
  <tt>null</tt>.