src/vs/workbench/contrib/userDataSync/browser/userDataSyncTrigger.ts/UserDataSyncTrigger/getUserDataEditorInputSource
class UserDataSyncTrigger:	private getUserDataEditorInputSource(editorInput: EditorInput | undefined): string | undefined {
		if (!editorInput) {
			return undefined;
		}
		if (editorInput instanceof SettingsEditor2Input) {
			return 'settingsEditor';
		}
		if (editorInput instanceof KeybindingsEditorInput) {
			return 'keybindingsEditor';
		}
		const resource = editorInput.resource;
		if (isEqual(resource, this.environmentService.settingsResource)) {
			return 'settingsEditor';
		}
		if (isEqual(resource, this.environmentService.keybindingsResource)) {
			return 'keybindingsEditor';
		}
		return undefined;
	}