code: def double(self, column, total=None, places=None):
          
          return self._add_column("double", column, total=total, places=places)
docs: Create a new double column on the table.
  
          :param column: The column
          :type column: str
  
          :type total: int
  
          :type places: 2
  
          :rtype: Fluent