private static List<PsiElement> getPsiElementsFromGroup(final PropertiesPrefixGroup propertiesPrefixGroup) {
    return ContainerUtil.mapNotNull(propertiesPrefixGroup.getChildren(), treeElement -> {
      if (treeElement instanceof PropertyStructureViewElement) {
        return ((PropertyStructureViewElement)treeElement).getPsiElement();
      }
      return null;
    });
  }
private static List<PsiElement> getPsiElementsFromGroup(final PropertiesPrefixGroup propertiesPrefixGroup)