code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
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  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
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  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  package org.openqa.selenium;
  
  /**
   * Indicates a driver or an HTML element that can capture a screenshot and store it in different
   * ways.
   *
   * <p>Example usage:
   *
   * <pre>
   * File screenshotFile = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
   * String screenshotBase64 = ((TakesScreenshot) element).getScreenshotAs(OutputType.BASE64);
   * </pre>
   *
   * @see OutputType
   */
  public interface TakesScreenshot {
    /**
     * Capture the screenshot and store it in the specified location.
     *
     * <p>For a W3C-conformant WebDriver or WebElement, this behaves as stated in <a
     * href="https://w3c.github.io/webdriver/#screen-capture">W3C WebDriver specification</a>.
     *
     * <p>For a non-W3C-conformant WebDriver, this makes a best effort depending on the browser to
     * return the following in order of preference:
     *
     * <ul>
     *   <li>Entire page
     *   <li>Current window
     *   <li>Visible portion of the current frame
     *   <li>The screenshot of the entire display containing the browser
     * </ul>
     *
     * For a non-W3C-conformant WebElement extending TakesScreenshot, this makes a best effort
     * depending on the browser to return the following in order of preference:
     *
     * <ul>
     *   <li>The entire content of the HTML element
     *   <li>The visible portion of the HTML element
     * </ul>
     *
     * @param <X> Return type for getScreenshotAs.
     * @param target target type, @see OutputType
     * @return Object in which is stored information about the screenshot.
     * @throws WebDriverException on failure.
     * @throws UnsupportedOperationException if the underlying implementation does not support
     *     screenshot capturing.
     */
    <X> X getScreenshotAs(OutputType<X> target) throws WebDriverException;
  }
  