getAllVariants: function(fnCallBack) {
        var oPersonalizationVariantSet= {},
            aExistingVariants =[],
            aVariantKeysAndNames =[];
        //get the personalization service of shell
        this._oPersonalizationService = sap.ushell.Container.getService('Personalization');
        this._oPersonalizationContainer = this._oPersonalizationService.getPersonalizationContainer("MyVariantContainer");
        this._oPersonalizationContainer.fail(function() {
            // call back function in case of fail
            fnCallBack(aExistingVariants);
        });
        this._oPersonalizationContainer.done(function(oPersonalizationContainer) {
            // check if the current variant set exists, If not, add the new variant set to the container
            if (!(oPersonalizationContainer.containsVariantSet('MyApplicationVariants'))) {
                oPersonalizationContainer.addVariantSet('MyApplicationVariants');
            }
            // get the variant set
            oPersonalizationVariantSet = oPersonalizationContainer.getVariantSet('MyApplicationVariants');
            aVariantKeysAndNames = oPersonalizationVariantSet.getVariantNamesAndKeys();
            for(var key in aVariantKeysAndNames){
                if (aVariantKeysAndNames.hasOwnProperty(key)) {
                    var oVariantItemObject = {};
                    oVariantItemObject.VariantKey = aVariantKeysAndNames[key];
                    oVariantItemObject.VariantName = key;
                    aExistingVariants.push(oVariantItemObject);
                }
            }
            fnCallBack(aExistingVariants);
        }.bind(this));
    }