Update models/__init__.py to include SparseGGNN
@@ -15,6 +15,7 @@ from chainer_chemistry.models import schnet # NOQA
from chainer_chemistry.models import weavenet # NOQA
from chainer_chemistry.models.ggnn import GGNN # NOQA
+from chainer_chemistry.models.ggnn import SparseGGNN # NOQA
from chainer_chemistry.models.ggnn_gwm import GGNN_GWM # NOQA
from chainer_chemistry.models.gin import GIN # NOQA
from chainer_chemistry.models.gin_gwm import GIN_GWM # NOQA
