'Check whether the modes for a course allow a student to pursue a verified certificate.
Args:
course_mode_dict (dictionary mapping course mode slugs to Modes)
Returns:
bool: True iff the course modes contain a verified track.'

@classmethod
def has_verified_mode(cls, course_mode_dict):

    for mode in cls.VERIFIED_MODES:
        if (mode in course_mode_dict):
            return True
    return False
