def get_on_premises_instance(instanceName=None):
    """
    Gets information about an on-premises instance.
    See also: AWS API Documentation
    
    
    :example: response = client.get_on_premises_instance(
        instanceName='string'
    )
    
    
    :type instanceName: string
    :param instanceName: [REQUIRED]
            The name of the on-premises instance about which to get information.
            

    :rtype: dict
    :return: {
        'instanceInfo': {
            'instanceName': 'string',
            'iamSessionArn': 'string',
            'iamUserArn': 'string',
            'instanceArn': 'string',
            'registerTime': datetime(2015, 1, 1),
            'deregisterTime': datetime(2015, 1, 1),
            'tags': [
                {
                    'Key': 'string',
                    'Value': 'string'
                },
            ]
        }
    }
    
    
    """
    pass
