title: Katalon : groovy.lang.MissingPropertyException : Using custom keyword in custom keyword
body: <p>In Katalon, if I want to use CustomKeyword inside another CustomKeyword. I getting <code>MissingPropertyException</code></p>
  
  <p><strong>Dialog Keywords</strong></p>
  
  <pre class="lang-groovy prettyprint-override"><code>public class Dialog {
  
      @Keyword
      def clickCancel() {
        WebUI.click(findTestObject('Common/Components/Dialog/btn_Cancel'))
      }
  
      ...
  }
  </code></pre>
  
  <p><strong>Root Navigation Keywords</strong></p>
  
  <pre class="lang-groovy prettyprint-override"><code>public class RootNavigations {
  
      @Keyword
      def checkDialogWorking() {
        WebUI.click(findTestObject('App/Page_Home/btn_OpenComparisons_Dialog_Home'))
        CustomKeywords.'com.app.Dialog.clickCancel'()
      }
  
      ...
  }
  </code></pre>
  
  <p><strong>Exception</strong></p>
  
  <pre><code>Test Cases/Smoke Test/Application/Check Dialog 
  FAILED because (of) (Stack trace: groovy.lang.MissingPropertyException: 
  No such property: CustomKeywords for class: com.app.RootNavigations
  </code></pre>