code: def _fetchAllChildren(self):
          
          assert self.canFetchChildren(), "canFetchChildren must be True"
  
          childItems = []
  
          # Add fields in case of an array of structured type.
          if self._isStructured:
              for fieldName in self._array.dtype.names:
                  childItem = FieldRti(self._array, nodeName=fieldName, fileName=self.fileName)
                  childItem._iconColor = self.iconColor
                  childItems.append(childItem)
  
          return childItems
docs: Fetches all fields that this variable contains.
              Only variables with a structured data type can have fields.