@classmethod
def definedThreatTypes(cls):
    """
        Class method to get all threat types defined in API v4.
        
        @return list of defined threat types
        @rtype list of str
        """
    return ['THREAT_TYPE_UNSPECIFIED', 'MALWARE', 'SOCIAL_ENGINEERING',
        'UNWANTED_SOFTWARE', 'POTENTIALLY_HARMFUL_APPLICATION']
