public static FetchCallback create(
                @NotBlank(message = "sortId should not be null or empty.") final String sortId,
                @NotNull(message = "channelProcessor should not be null.") final ChannelProcessor channelProcessor,
                @NotNull(message = "context should not be null") final SortSdkSourceContext context) {
            return new FetchCallback(sortId, channelProcessor, context);
        }
Create one {@link FetchCallback}.
<p> Validate sortId and channelProcessor before the construction of FetchCallback.</p>

@param sortId The sortId of fetched message.
@param channelProcessor The channelProcessor that put message in specific channel.
@param context The context to report fetch results.
@return One FetchCallback.
inlong-sort-standalone/sort-standalone-source/src/main/java/org/apache/inlong/sort/standalone/source/sortsdk/FetchCallback.java