private Function<ByteBuffer, MessageCommand<?, ?>> buildSendClaimMessage(final RequestContext ctx, final DittoHeaders dittoHeaders, final String thingId, final Duration timeout) { return payload -> { final ContentType contentType = ctx.getRequest() .entity() .getContentType(); final MessageHeaders headers = MessageHeaders.newBuilderForClaiming(thingId) .correlationId(dittoHeaders.getCorrelationId().orElse(null)) .contentType(contentType.toString()) .timeout(timeout) .timestamp(OffsetDateTime.now()) .putHeaders(dittoHeaders) .build(); final MessageBuilder<Object> messageBuilder = initMessageBuilder(payload, contentType, headers); return SendClaimMessage.of(thingId, messageBuilder.build(), enhanceHeaders(dittoHeaders)); }; }