title: _this2.pressRow is not a function
body: <p>I am trying to learn React Native and am currently trying to create a list view. The everything is loading fine, this issue comes on the press of a row where I get the following error.</p>
  
  <p><a href="https://i.stack.imgur.com/ArXPQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ArXPQ.png" alt="enter image description here"></a></p>
  
  <p>I come from a web and objective-c background so this is taking a little time to sink in. This is the code Im using for the screen.</p>
  
  <pre><code>import React, { Component } from 'react'
  import {
    StyleSheet,
    Text,
    View,
    ListView,
    TouchableHighlight
  } from 'react-native'
  
  export default class FeedView extends Component {
  
    static navigationOptions = {
      title: 'Chat with Feed',
    };
  
    constructor() {
      super();
      const ds = new ListView.DataSource({rowHasChanged: (r1, r2) =&gt; r1 !== r2});
      this.state = {
        dataSource: ds.cloneWithRows(['row 1', 'row 2']),
      };
    }
  
    render() {
      const { navigate } = this.props.navigation;
      return (
        &lt;View&gt;
          &lt;ListView
              dataSource={this.state.dataSource}
              renderRow={this._renderRow}
          /&gt;
        &lt;/View&gt;
      );
    }
  
    _renderRow( rowData: string, sectionID: number, rowID: number, highlightRow: (sectionID: number, rowID: number) =&gt; void ){
      return (
        &lt;TouchableHighlight onPress={() =&gt; {
            this._pressRow(rowID);
            highlightRow(sectionID, rowID);
          }}&gt;
          &lt;View&gt;
            &lt;View style={styles.row}&gt;
              &lt;Text style={styles.text}&gt;Testing&lt;/Text&gt;
            &lt;/View&gt;
          &lt;/View&gt;
        &lt;/TouchableHighlight&gt;
      );
    }
  
    _pressRow( rowID: number ){
  
    }
  
  }
  
  var styles = StyleSheet.create({
    row: {
      flexDirection: 'row',
      justifyContent: 'center',
      padding: 10,
      backgroundColor: '#F6F6F6',
    }
  });
  </code></pre>