src/vs/workbench/browser/parts/editor/editorStatus.ts/SideBySideEditorEncodingSupport/setEncoding
class SideBySideEditorEncodingSupport:	async setEncoding(encoding: string, mode: EncodingMode): Promise<void> {
		await Promises.settled([this.primary, this.secondary].map(editor => editor.setEncoding(encoding, mode)));
	}