function getParentVersion(mPropertyBag) {
		return Versions.getVersionsModel({ layer: mPropertyBag.layer, reference: mPropertyBag.appId }).getProperty("/persistedVersion");
	}
Get the parent version
@param {object} mPropertyBag - Object with parameters as properties
@param {string} mPropertyBag.appId - Reference app ID
@param {string} mPropertyBag.layer - Layer
@returns {string} Returns the currently displayed version id