getAllCurrencyDigits() {
			const mCurrencyDigits = {...this._get("currencyDigits")};
			const mCustomCurrencies = this._get("currency");
			if (mCustomCurrencies) {
				for (const sCurrencyCode in mCustomCurrencies) {
					if (mCustomCurrencies[sCurrencyCode].digits !== undefined) {
						mCurrencyDigits[sCurrencyCode] = mCustomCurrencies[sCurrencyCode].digits;
					}
				}
			}

			return mCurrencyDigits;
		}
Returns a language dependent map of ISO 4217 currency codes to the number of digits from the CLDR. The map
only contains currency codes for which the number of digits deviates from the value with the key
<code>DEFAULT</code>. If custom currencies are defined, they are merged into the map overwriting the CLDR
values including the default value if a custom default value is set.

@returns {Object<string, number>} The map of currency codes to the number of digits
@private
@ui5-restricted sap.ui.export.Spreadsheet
@since 1.135