title: How to get value attribute for corresponding button?
body: <pre><code>buttonPress = (event) =&gt; { console.log(event.props.value)}
  
    &lt;RaisedButton ref={(button) =&gt; { this.RaisedButton = button; }} label="Primary" value = "year" onTouchTap={()=&gt;this.buttonPress( this.RaisedButton )}  primary={true} /&gt;
  </code></pre>
  
  <p>When I try to render one button like the above, I get the value. But, when I render multiple buttons, I only get the last button's value for all the buttons. whatever button I click I get <code>year</code>.</p>
  
  <pre><code>    buttonPress = (event) =&gt; { console.log(event.props.value)}
  
        &lt;RaisedButton ref={(button) =&gt; { this.RaisedButton = button; }} label="Primary" value = "day" onTouchTap={()=&gt;this.buttonPress( this.RaisedButton )}  primary={true} /&gt;
   &lt;RaisedButton ref={(button) =&gt; { this.RaisedButton = button; }} label="Primary" value = "month" onTouchTap={()=&gt;this.buttonPress( this.RaisedButton )}  primary={true} /&gt;
   &lt;RaisedButton ref={(button) =&gt; { this.RaisedButton = button; }} label="Primary" value = "year" onTouchTap={()=&gt;this.buttonPress( this.RaisedButton )}  primary={true} /&gt;
  </code></pre>
  
  <p>How can I get the value for corresponding buttons?</p>