'Check whether the course enrollment is for a verified mode.
Arguments:
user (User): The user object.
course_key (CourseKey): The identifier for the course.
Returns: bool'

@classmethod
def is_enrolled_as_verified(cls, user, course_key):

    enrollment = cls.get_enrollment(user, course_key)
    return ((enrollment is not None) and enrollment.is_active and enrollment.is_verified_enrollment())
