The index of this cell in its containing notebook. The
index is updated when a cell is moved within its notebook. The index is
when the cell has been removed from its notebook.
The notebook that contains this cell.
The kind of this cell.
The text of this cell, represented as text document.
The metadata of this cell. Can be anything but must be JSON-stringifyable.
The outputs of this cell.
The most recent execution summary for this cell.