private void appendFilter(final StringBuilder sb, final ProcessorFilter filter) {
        sb.append("id: ");
        sb.append(filter.getId());
        sb.append(", priority: ");
        sb.append(filter.getPriority());
        if (!NullSafe.isEmptyString(filter.getPipelineName())) {
            sb.append(", pipeline: ");
            sb.append(filter.getPipelineName());
        }
    }
Holds state relating to the progress of creation of tasks by the master node
stroom-processor/stroom-processor-impl/src/main/java/stroom/processor/impl/ProgressMonitor.java