diff --git a/vscode.notebooks.d.ts b/vscode.notebooks.d.ts
new file mode 100644
index 0000000000..c1e10affe0
--- /dev/null
+++ b/vscode.notebooks.d.ts
@@ -0,0 +1,27 @@
+/*
+This file contains types introduced in a newer version of vscode than 1.45 that are used by the Notebook Mode feature.
+
+We are locked on to 1.45 because that is what SAWs support.
+
+Once SAWs support a newer version of vscode we can remove this. My hope is that this will be the only addition to this file.
+*/
+
+declare module 'vscode' {
+  /**
+	 * Accessibility information which controls screen reader behavior.
+	 */
+	export interface AccessibilityInformation {
+		/**
+		 * Label to be read out by a screen reader once the item has focus.
+		 */
+		label: string;
+
+		/**
+		 * Role of the widget which defines how a screen reader interacts with it.
+		 * The role should be set in special cases when for example a tree-like element behaves like a checkbox.
+		 * If role is not specified VS Code will pick the appropriate role automatically.
+		 * More about aria roles can be found here https://w3c.github.io/aria/#widget_roles
+		 */
+		role?: string;
+	}
+}
diff --git a/vscode.proposed.d.ts b/vscode.proposed.d.ts
index 900a7a44e5..11eeae9f06 100644
--- a/vscode.proposed.d.ts
+++ b/vscode.proposed.d.ts
@@ -96,7 +96,7 @@ declare module 'vscode' {
 
 	export interface NotebookCellMetadata {
 		/**
-		 * Controls if the content of a cell is editable or not.
+		 * Controls whether a cell's editor is editable/readonly.
 		 */
 		editable?: boolean;
 
@@ -245,10 +245,16 @@ declare module 'vscode' {
 		contains(uri: Uri): boolean
 	}
 
+	export interface WorkspaceEdit {
+		replaceCells(uri: Uri, start: number, end: number, cells: NotebookCellData[], metadata?: WorkspaceEditEntryMetadata): void;
+		replaceCellOutput(uri: Uri, index: number, outputs: CellOutput[], metadata?: WorkspaceEditEntryMetadata): void;
+		replaceCellMetadata(uri: Uri, index: number, cellMetadata: NotebookCellMetadata, metadata?: WorkspaceEditEntryMetadata): void;
+	}
+
 	export interface NotebookEditorCellEdit {
 
-		replaceCells(from: number, to: number, cells: NotebookCellData[]): void;
-		replaceOutputs(index: number, outputs: CellOutput[]): void;
+		replaceCells(start: number, end: number, cells: NotebookCellData[]): void;
+		replaceOutput(index: number, outputs: CellOutput[]): void;
 		replaceMetadata(index: number, metadata: NotebookCellMetadata): void;
 
 		/** @deprecated */
@@ -523,6 +529,35 @@ declare module 'vscode' {
 		resolveKernel?(kernel: T, document: NotebookDocument, webview: NotebookCommunication, token: CancellationToken): ProviderResult<void>;
 	}
 
+	/**
+	 * Represents the alignment of status bar items.
+	 */
+	export enum NotebookCellStatusBarAlignment {
+
+		/**
+		 * Aligned to the left side.
+		 */
+		Left = 1,
+
+		/**
+		 * Aligned to the right side.
+		 */
+		Right = 2
+	}
+
+	export interface NotebookCellStatusBarItem {
+		readonly cell: NotebookCell;
+		readonly alignment: NotebookCellStatusBarAlignment;
+		readonly priority?: number;
+		text: string;
+		tooltip: string | undefined;
+		command: string | Command | undefined;
+		accessibilityInformation?: AccessibilityInformation;
+		show(): void;
+		hide(): void;
+		dispose(): void;
+	}
+
 	export namespace notebook {
 		export function registerNotebookContentProvider(
 			notebookType: string,
@@ -580,6 +615,17 @@ declare module 'vscode' {
 		export function createConcatTextDocument(notebook: NotebookDocument, selector?: DocumentSelector): NotebookConcatTextDocument;
 
 		export const onDidChangeActiveNotebookKernel: Event<{ document: NotebookDocument, kernel: NotebookKernel | undefined }>;
+
+		/**
+		 * Creates a notebook cell status bar [item](#NotebookCellStatusBarItem).
+		 * It will be disposed automatically when the notebook document is closed or the cell is deleted.
+		 *
+		 * @param cell The cell on which this item should be shown.
+		 * @param alignment The alignment of the item.
+		 * @param priority The priority of the item. Higher values mean the item should be shown more to the left.
+		 * @return A new status bar item.
+		 */
+		export function createCellStatusBarItem(cell: NotebookCell, alignment?: NotebookCellStatusBarAlignment, priority?: number): NotebookCellStatusBarItem;
 	}
 
 	//#endregion