src/vs/workbench/api/common/extHostInteractive.ts/ExtHostInteractive/$willAddInteractiveDocument
class ExtHostInteractive:	$willAddInteractiveDocument(uri: UriComponents, eol: string, modeId: string, notebookUri: UriComponents) {
		this._textDocumentsAndEditors.acceptDocumentsAndEditorsDelta({
			addedDocuments: [{
				EOL: eol,
				lines: [''],
				modeId: modeId,
				uri: uri,
				isDirty: false,
				versionId: 1,
				notebook: this._extHostNotebooks.getNotebookDocument(URI.revive(notebookUri))?.apiNotebook
			}]
		});
	}