boolean (@Nullable PsiClass psiClass) { return psiClass != null && (InheritanceUtil.isInheritor(psiClass, JavaFxCommonNames.JAVAFX_COLLECTIONS_OBSERVABLE_LIST) || InheritanceUtil.isInheritor(psiClass, JavaFxCommonNames.JAVAFX_COLLECTIONS_OBSERVABLE_SET) || InheritanceUtil.isInheritor(psiClass, JavaFxCommonNames.JAVAFX_COLLECTIONS_OBSERVABLE_ARRAY)); }