//
// It returns an error if the sample type's intersection is empty.
func CompatibilizeSampleTypes(ps []*Profile) error {
	sTypes := commonSampleTypes(ps)
	if len(sTypes) == 0 {
		return fmt.Errorf("profiles have empty common sample type list")
	}
	for _, p := range ps {
		if err := compatibilizeSampleTypes(p, sTypes); err != nil {
			return err
		}
	}
	return nil
}

	//
	// The merge call below only treats exactly matching sample type lists as
	// compatible and will fail otherwise. Make the profiles' sample types
	// compatible for the merge, see CompatibilizeSampleTypes() doc for details.
	if err := profile.CompatibilizeSampleTypes(profiles); err != nil {
		return nil, nil, err
	}
	if err := measurement.ScaleProfiles(profiles); err != nil {
		return nil, nil, err
	}