code: public static void copyString(String value) {
          clipboardContents.put(((RemoteWebDriver) WebDriverConfig.getDriver()).getSessionId().toString(), value);
      }
docs: *
  Correlates the given String with the current WebDriver instance and stores it so it can be pasted somewhere else.
  Note that at this point the value is not added to the system clipboard, but only stored in the application memory,
  so it can only be pasted using the {@link #pasteString(WebLocator) pasteString} method.
  <p>
  This implementation is useful for avoiding mixing clipboard values from one WebDriver instance to another
  
  @param value String to be copied