from ._core import AbstractBlackReferenceMethod, AbstractFileBasedBlackReferenceMethod, AbstractAnnotationBasedBlackReferenceMethod
from ._avg import BlackReferenceAverage
from ._avg_annotation import BlackReferenceAnnotationAverage
from ._col_avg import BlackReferenceColumnAverage
from ._none import NoBlackReference
from ._same_size import SameSizeBlackReference
