code: function() {
          console.log(
              `LocalIndexedDBStoreBackend: loading account data...`,
          );
          return Promise.try(() => {
              const txn = this.db.transaction(["accountData"], "readonly");
              const store = txn.objectStore("accountData");
              return selectQuery(store, undefined, (cursor) => {
                  return cursor.value;
              }).then((result) => {
                  console.log(
                      `LocalIndexedDBStoreBackend: loaded account data`,
                  );
                  return result;
              });
          });
      }
docs: Load all the account data events from the database. This is not cached.
  @return {Promise<Object[]>} A list of raw global account events.