@PipelineProperty(description = "Choose the name that files will be renamed to when they are rolled.",
            displayPriority = 3)
    public void setRolledFileName(final String rolledFileNamePattern) {
        this.rolledFileNamePattern = rolledFileNamePattern;
    }
Parses a POSIX-style file permission string like "rwxr--r--"
stroom-pipeline/src/main/java/stroom/pipeline/writer/RollingFileAppender.java