ReactNative NavigatorIOS component doesn't pass 'navigator' object into props

gistfile1.js

var CBSupport  = React.createClass({

  _handleNextButtonPress: function() {
    debugger
    AlertIOS.alert("Be A Lert");
    // this.props does not contain a 'navigator' property
    this.props.navigator.push({
          component: Login,
          title: 'Login'
    });
  },

  render: function() {
    return(
      <NavigatorIOS
        style={styles.container}
        initialRoute={{
          component: Accounts,
          title: 'Accounts',
          rightButtonTitle: 'Add',
          onRightButtonPress: this._handleNextButtonPress,
        }}
      />    
    )
  }
})

I'm probably doing something wrong, but I'm trying to navigate to a new scene by tapping the right button on a NavigatorIOS component.

The onRightButtonPress fires, as does the subsequent AlertIOS, but this.props doesn't contain a reference to the navigator.

What am I missing?