public static GremlinError binding() {
        final String message = String.format("The message is using one or more invalid binding keys - they must be of type String and cannot be null");
        return new GremlinError(HttpResponseStatus.BAD_REQUEST, message, "InvalidRequestException");
    }
Exception utility class that generates exceptions in the form expected in a {@code ResponseStatus} for different
issues that the server can encounter.
gremlin-server/src/main/java/org/apache/tinkerpop/gremlin/server/util/GremlinError.java