setCustomUnits(mUnits) {
			// add custom units, or remove the existing ones if none are given
			let mUnitsshort = null;
			if (mUnits) {
				mUnitsshort = {
					"short": mUnits
				};
			}
			_set("units", mUnitsshort);
		}
Replaces existing custom units by the given custom units.

<b>Note:</b> Setting custom units affects all applications running with the current UI5 core instance.

@param {Object<string,module:sap/base/i18n/Formatting.CustomUnit>} [mUnits]
  A map with the unit code as key and a custom unit definition as value; <code>mUnits</code> replaces the
  current custom units; if not given, all custom units are deleted; see
  {@link #.getCustomUnits Formatting.getCustomUnits} for an example

@public
@see {@link module:sap/base/i18n/Formatting.addCustomUnits Formatting.addCustomUnits}
@since 1.123