code: def _fetchAllChildren(self):
          
          childItems = []
          if self._array.ndim == 2:
              _nRows, nCols = self._array.shape if self._array is not None else (0, 0)
              for col in range(nCols):
                  colItem = SliceRti(self._array[:, col], nodeName="channel-{}".format(col),
                                     fileName=self.fileName, iconColor=self.iconColor,
                                     attributes=self.attributes)
                  childItems.append(colItem)
          return childItems
docs: Adds an ArrayRti per column as children so that they can be inspected easily