@Override
    public HierarchyBrowser createHierarchyBrowser(PsiElement target) {
        return new SdCallHierarchyBrowser(target.getProject(), target);
    }
This class is used for the extension (in plugin.xml), to enable "Call Hierarchy" window using the plugin code.

@author Shahar Ariel
integration/intellij/src/main/java/ai/vespa/intellij/schema/hierarchy/SdCallHierarchyProvider.java