async handleIndexAddition(message) {
    const { index, scope } = message;

    debug(
      "New index added by node %s (scope: %s, index: %s)",
      this.remoteNodeId,
      scope,
      index,
    );

    await global.kuzzle.ask(`core:storage:${scope}:cache:addIndex`, index);
  }
Adds a new index to the index cache

@param {Object} message - decoded IndexCacheAdd protobuf message
@return {void}