function standardizeClassWeights(classWeight, outputNames) {
	  return standardizeSampleOrClassWeights(classWeight, outputNames, 'classWeight');
	}
Standardize class weighting objects.

This function takes a single class-weighting object, an array of them,
or a map from output name to class-weighting object. It compares it to the
output name(s) of the model, base on which it outputs an array of
class-weighting objects of which the length matches the number of outputs.

@param classWeight Input class-weighting object(s).
@param outputNames All output name(s) of the model.
@return An array of class-weighting objects. The length of the array matches
  the model's number of outputs.