def METHOD_NAME(instance, null_users=False):
    """
    A utility to create JSON-able data from a model instance.
    Arguments:
    instance -- objects.get() object instance.
    null_users -- Whether to null user references.
    Returns:
    A dictionary of metadata of instance.
    """
    data = {}
    for key, value in instance.__dict__.items():
        if isinstance(value, ModelState):
            continue
        elif null_users == True and ('user_id' in key or 'owner' in key):
            data[key] = None
        elif isinstance(value, StreamValue):
            data[key] = json.dumps(value.stream_data, cls=DjangoJSONEncoder)
        elif isinstance(value, FieldFile) or isinstance(value, File):
            data[key] = {'name': value.name, 'size': value.size}
        else:
            data[key] = value
    return dat