getValue() {
			let maxConfidence = -1;
			let result = new Array();
			for (const [key, value] of this.values.entries()) {
				const entry = {
					getKey: () => key,
					getValue: () => value,
				};
				if (entry.getValue() > maxConfidence) {
					maxConfidence = entry.getValue();
					result = [];
					result.push(entry.getKey());
				}
				else if (entry.getValue() === maxConfidence) {
					result.push(entry.getKey());
				}
			}
			return PDF417Common.toIntArray(result);
		}
Determines the maximum occurrence of a set value and returns all values which were set with this occurrence.
@return an array of int, containing the values with the highest occurrence, or null, if no value was set