Adding JFace/SWT to en existing application - unresolved SWT error

I'm trying to add JFace/SWT to an application I'm building.

I prefer this approach to JavaFX due to the native look and feel of the Eclipse widgets.

I add the JFace library via the Maven search making my dependency: eclipse.platform.jface

It creates the eclipse_platform_jface.xml :

``` <component name="libraryTable">  
     <library name="eclipse.platform.jface" type="repository">  
       <properties maven-id="org.eclipse.platform:org.eclipse.jface:3.34.0" />  
       <CLASSES>  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.jface/3.34.0/org.eclipse.jface-3.34.0.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.swt/3.126.0/org.eclipse.swt-3.126.0.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.core.commands/3.12.100/org.eclipse.core.commands-3.12.100.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.equinox.common/3.19.100/org.eclipse.equinox.common-3.19.100.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.osgi/3.20.0/org.eclipse.osgi-3.20.0.jar!/" />  
       </CLASSES>  
       <JAVADOC>  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.jface/3.34.0/org.eclipse.jface-3.34.0-javadoc.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.swt/3.126.0/org.eclipse.swt-3.126.0-javadoc.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.core.commands/3.12.100/org.eclipse.core.commands-3.12.100-javadoc.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.equinox.common/3.19.100/org.eclipse.equinox.common-3.19.100-javadoc.jar!/" />  
         <root url="jar://$MAVEN_REPOSITORY$/org/eclipse/platform/org.eclipse.osgi/3.20.0/org.eclipse.osgi-3.20.0-javadoc.jar!/" />  
       </JAVADOC>  
       <SOURCES />  
     </library>  
   </component>
```

This includes a dependency for org.eclipse.swt. Yet when I start to build the application it clearly feels that swt is missing as evidenced by syntax errors on Shell and anything else from SWT.

In addition when I dive into the decompiled code, I see a similar problem in that the decompiler can't find the declaration for shell.

What have I missed in coaxing Intellij to do my bidding?