boolean isStreamTypeLazy(final String streamTypeName) {
        return InternalStreamTypeNames.SEGMENT_INDEX.equals(streamTypeName)
               || InternalStreamTypeNames.BOUNDARY_INDEX.equals(streamTypeName);
    }
Gets all files associated with a parent.
stroom-data/stroom-data-store-impl-fs/src/main/java/stroom/data/store/impl/fs/FsPathHelper.java