def exists(test_subject, keys):
    """Check if a list of keys exists in an object.

    :param test_subject: A dictionary object.
    :type test_subject: dic
    :param keys: The list of keys to be checked against the 'test_subject'.
    :type keys: list of str
    :return: True if the list of keys is available, false otherwise.
    :rtype: bool
    """    
    #Examples:froggy.gadgets.exists({"id": 1, "name": "Anna"}, {"createdon", "updatedon"})
    for key in keys:
        if key in test_subject:
            # Check if there is a value in the key, if not, return false.
            if (not test_subject[key]): 
                return(False)
        else:
            return(False)
    # 'They call me Mister Tibbs!'
    return(True)