@PipelineProperty(
            description = "When the current output file exceeds this size it will be closed and a new one " +
                          "created, e.g. 10M, 1G.",
            defaultValue = "100M",
            displayPriority = 6)
    public void setRollSize(final String rollSize) {
        super.setRollSize(rollSize);
    }
Parses a POSIX-style file permission string like "rwxr--r--"
stroom-pipeline/src/main/java/stroom/pipeline/writer/RollingFileAppender.java