Appends a single indexed-value pair, to a symbol object, to be
        used during the final steps of the aggregation of the datatable.

        With default settings Overrides, get applied with highest priority.
        
        Parameters
        ----------
        symbol : Symbol or str
            The Symbol to override
        ind : obj
            The index value where the override should be applied
        val : obj
            The data value which will be used in the override
        dt_log : datetime
            A log entry, for saving when this override was created.
        user : str
            A string representing which user made the override
        comment : str
            A string to store any notes related to this override.

def add_override(self, symbol, ind, val, dt_log=None, user=None, comment=None):
        """
        Appends a single indexed-value pair, to a symbol object, to be
        used during the final steps of the aggregation of the datatable.

        With default settings Overrides, get applied with highest priority.
        
        Parameters
        ----------
        symbol : Symbol or str
            The Symbol to override
        ind : obj
            The index value where the override should be applied
        val : obj
            The data value which will be used in the override
        dt_log : datetime
            A log entry, for saving when this override was created.
        user : str
            A string representing which user made the override
        comment : str
            A string to store any notes related to this override.
        """
        self._add_orfs('override', symbol, ind, val, dt_log, user, comment)