@PipelineProperty(
            description = "Should the output stream be marked with indexed segments to allow fast access to " +
                    "individual records?",
            defaultValue = "true",
            displayPriority = 6)
    public void setSegmentOutput(final boolean segmentOutput) {
        this.segmentOutput = segmentOutput;
    }
Joins text instances into a single text instance.
stroom-pipeline/src/main/java/stroom/pipeline/writer/RollingStreamAppender.java