@Nullable
    public static String getNamespaceUriStatic(String prefix, XmlElement context) {
        final XmlTag tag = PsiTreeUtil.getParentOfType(context, XmlTag.class);
        return tag != null ? tag.getNamespaceByPrefix(prefix) : null;
    }
@Nullable
    public static String getNamespaceUriStatic(String prefix, XmlElement context)