docs: 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)