class DefaultAtlasSession implements AtlasInternalSession {

    @Override
    public AtlasFieldReader removeFieldReader(String docId) {
        if (docId == null || docId.isEmpty()) {
            return this.fieldReaderMap.remove(AtlasConstants.DEFAULT_SOURCE_DOCUMENT_ID);
        }
        return fieldReaderMap.remove(docId);
    }

    public  DefaultAtlasSession(DefaultAtlasContext context);

}