title: How to create a custom drop down control list in Google Data Studio? (using multi category column or multiple binary columns)
body: <p>My use case is that one of the columns in my table has multiple categories included. For example, entry 1 may say <em>budget, schedule</em>, entry 2 may say <em>schedule, quality</em> and entry 3 may say <em>schedule</em>. I can also change it so that <em>budget, schedule and quality</em> become boolean columns.</p>
  <p>I would like to create a drop down option that list each grade level individually and when one of the categories is selected,  I want the table to filter based on the selection in the drop down. So when someone selects <em>schedule</em>, all 3 entries, in this scenario, will be displayed.</p>
  <p>Do you believe this is possible to do in Data Studio?</p>
  <p>Thank you</p>