title: grails find() using 3 fields/columns (i.e. a find with multiple columns)
body: <p>I'm a little confused about the Grails HQL documentation.  Say I have a domain class with 3 fields, </p>
  
  <pre><code>class Example {
     String a 
     String b
     String c
   }
  </code></pre>
  
  <p>and I want to do the equivalent of an Example.findByAAndBAndC(), can you show me the line of code that I'd use to set that up and pass in the 3 parameters?  Note the documentation says, one can at most use two fields for the findBy.  I need to do 3 fields.</p>
  
  <p>Thanks</p>