title: What't the means about var () in golang
body: <p>I go though the code generated by go-swagger, found follow code:</p>
  
  <pre><code>// NewReceiveLearningLabActsParams creates a new ReceiveLearningLabActsParams object
  // with the default values initialized.
  func NewReceiveLearningLabActsParams() ReceiveLearningLabActsParams {
      var ()
      return ReceiveLearningLabActsParams{}
  }
  </code></pre>
  
  <p>I noticed here:</p>
  
  <pre><code>var ()
  </code></pre>
  
  <p>I totally not understand what's the means, could anyone help me understand this code? thanks</p>