public async executeCell(
        document: vscode.NotebookDocument,
        cell: vscode.NotebookCell | undefined,
        token: CancellationToken
    ): Promise<void> {

	cell.outputs = [
	    {
	        outputKind: 3,
	        data: {
	            'text/plain': 'First Plot',
	            'image/svg+xml':
	                '<?xml version="1.0" encoding="utf-8"?><!DOCTYPE svg><svg width="220px" height="120px"  xmlns="http://www.w3.org/2000/svg"><g><text font-size="32"  x="25" y="60">First Plot!</text></g></svg>\n',
	            'image/png':
	                'iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==\n'
	        }
	    },
	    {
	        outputKind: 3,
	        data: {
	            'text/plain': 'Second Plot',
	            'image/svg+xml':
	                '<?xml version="1.0" encoding="utf-8"?><!DOCTYPE svg><svg width="220px" height="120px"  xmlns="http://www.w3.org/2000/svg"><g><text font-size="32"  x="25" y="60">First Plot!</text></g></svg>\n',
	            'image/png':
	                'iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==\n'
	        }
	    }
	];