code: def rowsAfterValue(self, value, count):
          
          if value is None:
              query = self.inequalityQuery(None, count, True)
          else:
              pyvalue = self._toComparableValue(value)
              currentSortAttribute = self.currentSortColumn.sortAttribute()
              query = self.inequalityQuery(currentSortAttribute >= pyvalue, count, True)
          return self.constructRows(query)
docs: Retrieve some rows at or after a given sort-column value.
  
          @param value: Starting value in the index for the current sort column
          at which to start returning results.  Rows with a column value for the
          current sort column which is greater than or equal to this value will
          be returned.
  
          @type value: Some type compatible with the current sort column, or
          None, to specify the beginning of the data.
  
          @param count: The maximum number of rows to return.
          @type count: C{int}
  
          @return: A list of row data, ordered by the current sort column,
          beginning at C{value} and containing at most C{count} elements.