static getAllChildValues(oNode) {
		let aResult = [];
		Object.keys(oNode).forEach((sChildKey) => {
			if (typeof oNode[sChildKey] === "object") {
				aResult = aResult.concat(Timezones.getAllChildValues(oNode[sChildKey]));
			} else if (!sChildKey.startsWith("_")) {
				aResult.push(oNode[sChildKey]);
			}
		});

		return aResult;
	}
Gets all values of the leaves in the object structure. Path segments that start with "_" are skipped.

@param {Object<string, any>} oNode The object to flatten; all leaves have to be of type string
@returns {string[]} The leaves of the object tree