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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_sources_from_roi(self, names, roi, free=False, **kwargs):
 """Add multiple sources to the current ROI model copied from another ROI model. Parameters names : list List of str source names to add. roi : `~fermipy.roi_model.ROIModel` object The roi model from which to add sources. free : bool Initialize the source with a free normalization paramter. """


        for name in names:
            self.add_source(name, roi[name].data, free=free, **kwargs)