code: public static File unpack() {
          String javaIoTmpdir = System.getProperty("java.io.tmpdir");
          //multiple versions can coexist
          return unpack(new File(javaIoTmpdir, "phantomjs-" + PHANTOMJS_VERSION));
      }
docs: Unpack bundled phantomjs binary into ${java.io.tmpdir}/phantomjs-${phantomjs.version}/phantomjs
  
  @return File of the unbundled phantomjs binary