src/vs/workbench/services/preferences/browser/preferencesService.ts/PreferencesService/createSplitJsonEditorInput
class PreferencesService:	private createSplitJsonEditorInput(configurationTarget: ConfigurationTarget, resource: URI, editableSettingsEditorInput: IEditorInput): IEditorInput {
		const defaultPreferencesEditorInput = this.instantiationService.createInstance(DefaultPreferencesEditorInput, this.getDefaultSettingsResource(configurationTarget));
		const preferencesEditorInput = new PreferencesEditorInput(this.getPreferencesEditorInputName(configurationTarget, resource), editableSettingsEditorInput.getDescription(), defaultPreferencesEditorInput, <EditorInput>editableSettingsEditorInput);
		this.lastOpenedSettingsInput = preferencesEditorInput;

		return preferencesEditorInput;
	}