title: SSAS how to eliminate blank option in filter's hierarchy
body: <p>As the following snapshot shows, how could I eliminate or hide the blank option of the hierarchy? I know this is caused by null values in table but I do not want it to show up in the filter.</p>
  
  <p><img src="https://i.stack.imgur.com/g1Byq.jpg" alt="enter image description here"></p>