old_contents: import React, { Component } from 'react';
  import { Linking, Text } from 'react-native';
  
  /**
   * Implements a (hyper)link to a URL in the fashion of the HTML anchor element
   * and its href attribute.
   */
  export class Link extends Component {
      /**
       * Initializes a new Link instance.
       *
       * @param {Object} props - Component properties.
       */
      constructor(props) {
          super(props);
  
          // Bind event handlers so they are only bound once for every instance.
          this._onPress = this._onPress.bind(this);
      }
  
      /**
       * Implements React's {@link Component#render()}.
       *
       * @inheritdoc
       * @returns {ReactElement}
       */
      render() {
          return (
              <Text
                  onPress = { this._onPress }
                  style = { this.props.style }>
                  {
                      this.props.children
                  }
              </Text>
          );
      }
  
      /**
       * Notifies this instance that Linking failed to open the associated URL.
       *
       * @param {any} reason - The rejection reason.
       * @private
       * @returns {void}
       */
      _onLinkingOpenURLRejected(reason) {
          const onRejected = this.props.onLinkingOpenURLRejected;
  
          onRejected && onRejected(reason);
      }
  
      /**
       * Handles press on this Link. Opens the URL associated with this Link.
       *
       * @private
       * @returns {void}
       */
      _onPress() {
          Linking.openURL(this.props.url)
              .catch(reason => this._onLinkingOpenURLRejected(reason));
      }
  }
  
  /**
   * Link component's property types.
   */
  Link.propTypes = {
      /**
       * The children to be displayed within this Link.
       */
      children: React.PropTypes.node,
  
      /**
       * Notifies that this Link failed to open the URL associated with it.
       */
      onLinkingOpenURLRejected: React.PropTypes.function,
  
      /**
       * The CSS style to be applied to this Link for the purposes of display.
       */
      style: React.PropTypes.object,
  
      /**
       * The URL to be opened when this Link is clicked/pressed.
       */
      url: React.PropTypes.string
  };
  
new_contents: import React, { Component } from 'react';
  import { Linking, Text } from 'react-native';
  
  /**
   * Implements a (hyper)link to a URL in the fashion of the HTML anchor element
   * and its href attribute.
   */
  export class Link extends Component {
      /**
       * Initializes a new Link instance.
       *
       * @param {Object} props - Component properties.
       */
      constructor(props) {
          super(props);
  
          // Bind event handlers so they are only bound once for every instance.
          this._onPress = this._onPress.bind(this);
      }
  
      /**
       * Implements React's {@link Component#render()}.
       *
       * @inheritdoc
       * @returns {ReactElement}
       */
      render() {
          return (
              <Text
                  onPress = { this._onPress }
                  style = { this.props.style }>
                  {
                      this.props.children
                  }
              </Text>
          );
      }
  
      /**
       * Notifies this instance that Linking failed to open the associated URL.
       *
       * @param {any} reason - The rejection reason.
       * @private
       * @returns {void}
       */
      _onLinkingOpenURLRejected(reason) {
          const onRejected = this.props.onLinkingOpenURLRejected;
  
          onRejected && onRejected(reason);
      }
  
      /**
       * Handles press on this Link. Opens the URL associated with this Link.
       *
       * @private
       * @returns {void}
       */
      _onPress() {
          Linking.openURL(this.props.url)
              .catch(reason => this._onLinkingOpenURLRejected(reason));
      }
  }
  
  /**
   * Link component's property types.
   */
  Link.propTypes = {
      /**
       * The children to be displayed within this Link.
       */
      children: React.PropTypes.node,
  
      /**
       * Notifies that this Link failed to open the URL associated with it.
       */
      onLinkingOpenURLRejected: React.PropTypes.func,
  
      /**
       * The CSS style to be applied to this Link for the purposes of display.
       */
      style: React.PropTypes.object,
  
      /**
       * The URL to be opened when this Link is clicked/pressed.
       */
      url: React.PropTypes.string
  };
  
subject: Fix React.PropTypes warning