<gh_stars>0
from featuretools.primitives.base import AggregationPrimitive


class Sum(AggregationPrimitive):
    """A primitive that should currently exist for testing."""
    pass

from featuretools.primitives.base import AggregationPrimitive


class Sum(AggregationPrimitive):
    """A primitive that should currently exist for testing."""
    pass
A primitive that should currently exist for testing.