title: The constant cannot be marked static
body: <p>I am trying to declare a PI constant like this:</p>
  
  <pre><code>public static const double PI = Math.PI;
  </code></pre>
  
  <p>but why am I getting this error?</p>
  
  <pre><code>The constant 'Calendar.NewCalendar.PI' cannot be marked static
  </code></pre>