Entities do not play nicely with @property setters: AttributeError

[six8]

from springfield import Entity, fields

class TestEntity(Entity):
    foo = fields.StringField()

    @property
    def bar(self):
        return True

    @bar.setter
    def bar(self, value):
        print 'Set bar to %s' % value

e = TestEntity()
print e.bar
e.bar = False

True
Traceback (most recent call last):
  File "/Users/mthornton/Library/Preferences/PyCharm2017.3/scratches/scratch.py", line 16, in <module>
    e.bar = False
  File "/Users/mthornton/Projects/PulseSecure/pulse-one-pycharm/venv/lib/python2.7/site-packages/springfield/entity.py", line 203, in __setattr__
    raise AttributeError('Field %r not defined.' % name)
AttributeError: Field 'bar' not defined.