getFlexVersion(mPropertyBag) {
			return InitialFlexAPI.getFlexVersion(mPropertyBag);
		}
Returns the version that is used for Flexibility Services

@param {object} mPropertyBag - Object with parameters as properties
@param {string} mPropertyBag.reference - Reference of the application
@returns {string} Version of Flexibility Services

@private
@ui5-restricted sap.ushell