def METHOD_NAME(self):
    """The columns that should be filtered.
    A filter configuration is a `list` of three elements:
        0: `str` column name.
        1: a filter comparison string (i.e. "===", ">")
        2: a value to compare (this will be casted to match the type of
            the column)
    Returns:
        `list`: the filter configurations of the view stored in a `list` of
            lists
    """
    return self._filter