from landlab.field.scalar_data_fields import ScalarDataFields, FieldError
from landlab.field.grouped import ModelDataFields, GroupError, GroupSizeError
from landlab.field.field_mixin import ModelDataFieldsMixIn

__all__ = ['ScalarDataFields', 'ModelDataFields', 'ModelDataFieldsMixIn',
           'FieldError', 'GroupError', 'GroupSizeError']

from landlab.field.scalar_data_fields import ScalarDataFields, FieldError
from landlab.field.grouped import ModelDataFields, GroupError, GroupSizeError
from landlab.field.field_mixin import ModelDataFieldsMixIn
from .graph_field import GraphFields

__all__ = ['ScalarDataFields', 'ModelDataFields', 'ModelDataFieldsMixIn',
           'FieldError', 'GroupError', 'GroupSizeError', 'GraphFields', ]

Add GraphFields to package import.
Add GraphFields to package import.
