@Override public void setResponseHeader(String key, String value, String... vs) { if (Headers.canonicalKey(key).equals(OutputEvent.CONTENT_TYPE_HEADER)) { invocationContext.setResponseContentType(value); invocationContext.setResponseHeader("Fn-Http-H-" + key, value); } else { invocationContext.setResponseHeader("Fn-Http-H-" + key, value, vs); } }