getAllFlexObjects(mPropertyBag) {
			var aFlexObjects = [];
			return this.forEachObjectInStorage(mPropertyBag, function(mFlexObject) {
				aFlexObjects.push(mFlexObject);
			})
			.then(function() {
				return aFlexObjects;
			});
		}
Returns an array with all the flex objects in the storage

@param {object} mPropertyBag - object with the necessary information
@returns {Promise} Returns a Promise resolving with an array containing maps with two keys: 'key' and 'changeDefinition'