'**SUMMARY**
This function returns the maximum and minimum x and y values for the feature and
returns them as a tuple.
**RETURNS**
A tuple of the extents of the feature. The order is (MaxX,MaxY,MinX,MinY).
**EXAMPLE**
>>> img = Image("OWS.jpg")
>>> blobs = img.findBlobs(128)
>>> print blobs[-1].extents()'

def extents(self):

    self._updateExtents()
    return self.mExtents
