def METHOD_NAME(self, subject_data: dict) -> dict[str, Subject]:
    """Instantiate subjects of this report."""
    subjects = {}
    for subject_uuid, subject in subject_data.items():
        if isinstance(subject, Subject):
            subjects[subject_uuid] = subject
        else:
            subjects[subject_uuid] = Subject(self.__data_model, subject, subject_uuid, self)
    return subjects