The affected cell.
The document of the cell or undefined when it did not change.
Note that you should use the onDidChangeTextDocument-event for detailed change information, like what edits have been performed.
The new metadata of the cell or undefined when it did not change.
The new outputs of the cell or undefined when they did not change.
The new execution summary of the cell or undefined when it did not change.
Describes a change to a notebook cell.
NotebookDocumentChangeEvent