set(sName, vValue) {
				const rValidKey = /^[a-z][A-Za-z0-9]*$/;
				if (rValidKey.test(sName)) {
					oProvider.set(sName, vValue);
					_Configuration._.invalidate();
				} else {
					throw new TypeError(
						"Invalid configuration key '" + sName + "'!"
					);
				}
			}
Returns a writable base configuration instance
@returns {module:sap/base/config} The writable base configuration
@private
@ui5-restricted sap.ui.core, sap.fl