private FsTarget child(final String streamTypeName) {
        final Path childFile = fileSystemStreamPathHelper.getChildPath(getFile(), streamTypeName);
        return new FsTarget(metaService, fileSystemStreamPathHelper, this, streamTypeName, childFile);
    }
Creates a new file system stream target.

@return A new file system target.
stroom-data/stroom-data-store-impl-fs/src/main/java/stroom/data/store/impl/fs/FsTarget.java