title: Why are there parenthesis after the value of this variable in Swiftui?
body: <p>Why are there parenthesis after the value of the entries variable in Swiftui?  What does this mean?</p>
  <pre><code>func barChartItems() -&gt; [ChartDataEntry] {
      var entries = [ChartDataEntry]()
      ...
  }
  </code></pre>