loadFlVariant(mPropertyBag) {
			const mParameters = {
				id: mPropertyBag.variantReference,
				version: mPropertyBag.version
			};
			if (this.isLanguageInfoRequired) {
				InitialUtils.addLanguageInfo(mParameters);
			}
			const sVariantDataUrl = InitialUtils.getUrl(this.ROUTES.VARIANTDATA, mPropertyBag, mParameters);
			return InitialUtils.sendRequest(sVariantDataUrl, "GET", {initialConnector: this}).then(function(oResult) {
				return oResult.response;
			});
		}
Loads a variant from the back end.

@param {object} mPropertyBag - Further properties
@param {string} mPropertyBag.url - Configured url for the connector
@param {string} mPropertyBag.reference - Flexibility reference
@param {string} mPropertyBag.variantReference - Variant references to be loaded
@param {string} [mPropertyBag.version] - Version of the adaptation to be loaded
@returns {Promise<object>} Promise resolving with the JSON parsed server response of the variant data request