... and in `SGDClassifier`. The only nasty bit is the docstring, which must be duplicated:

```python
class FakeSVC(object):
    def __init__(self, probability=False):
        self.probability = probability

    @property
    def predict_proba(self):
        """Wrapper."""
        if self.probability:
            return self._predict_proba
        else:
            raise AttributeError("self.probability says no.")

    def _predict_proba(self, X):
        """Actual method."""

help(FakeSVC.predict_proba)
help(FakeSVC(probability=True).predict_proba)
```