constructor(sType, oParameters) {
			//copy & freeze parameters
			for (const param in oParameters) {
				this[param] = oParameters[param];
				Object.defineProperty(this, param, { configurable: false, writable: false });
			}
			this[EVENT_PARAMETERS_SYMBOL] = oParameters;
			this.#type = sType;
		}
The type of the event
@type {string}
@private
@ui5-restricted sap.ui.core