getCLDR2ABAPTimezoneMapping() {
		if (!this.mCLDR2ABAPTimezones) {
			const aNotInABAP = this.aSupportedTimezones
				.filter((sTimezoneID) => !this.aABAPTimezoneIDs.includes(sTimezoneID));
			const aNotInCLDR = this.aABAPTimezoneIDs
				.filter((sTimezoneID) => !this.aSupportedTimezones.includes(sTimezoneID));
			this.mCLDR2ABAPTimezones = {};
			aNotInABAP.forEach((sCLDRTimezoneID) => {
				const sMatchingABAPTimezoneID = aNotInCLDR
					.find((sABAPTimezoneID) => this.mAlias2SupportedTz[sABAPTimezoneID] === sCLDRTimezoneID);
				if (!sMatchingABAPTimezoneID) {
					console.log(`WARNING: No matching ABAP timezone found for CLDR timezone '${sCLDRTimezoneID}'`);
					return;
				}
				this.mCLDR2ABAPTimezones[sCLDRTimezoneID] = sMatchingABAPTimezoneID;
			});
		}

		return this.mCLDR2ABAPTimezones;
	}
Returns an object which maps a supported CLDR time zone ID to the corresponding ABAP timezone ID.
The map is remembered as the <code>mCLDR2ABAPTimezones</code> attribute of this instance.

@returns {Object<string, string>}
  An object which maps a supported CLDR time zone ID to the corresponding ABAP timezone ID