title: grails plugin question - unable to resolve class
body: <p>i'm writing my first plugin, </p>
  
  <p>but in test project, can't resolve the class of plugin (src/groovy)</p>
  
  <p><img src="https://i.stack.imgur.com/g90ai.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/lmsus.png" alt="enter image description here"></p>