code: def columnType( self ):
          
          schema = self.treeWidget().parent().schema()
          if ( not schema ):
              return 0
          column = schema.column(self.text(0))
          if ( column ):
              return column.columnType()
          return ColumnType.String
docs: Returns the column type for this item based on the current column.
          
          :return     <orb.ColumnType>