docs: function initialize () {
          return store.defineTable({
              name: operationTableName,
              columnDefinitions: {
                  id: ColumnType.Integer,
                  tableName: ColumnType.String,
                  action: ColumnType.String,
                  itemId: ColumnType.String,
                  metadata: ColumnType.Object 
              }
          }).then(function() {
              return getMaxOperationId();
          }).then(function(id) {
              maxId = id;
              isInitialized = true;
          });
      }