def meanfield_sgdstep(self, data, minibatchfrac, stepsize, **kwargs):
l = Labels(data=np.asarray(data), components=self.components, weights=self.weights, **kwargs)
## local vb
l.meanfieldupdate()
## sgd steps on global variables
self.weights.meanfield_sgdstep(None, l.r, minibatchfrac, stepsize)
for idx, c in enumerate(self.components):
c.meanfield_sgdstep(l.data, l.r[:, idx], minibatchfrac, stepsize)
