static async search(searchBody, options) {
    const resp = await global.kuzzle.internalIndex.search(
      this.collection,
      searchBody,
      options,
    );
    return resp.hits.map((hit) => this._instantiateFromDb(hit));
  }
Returns instances matching the given query

@param {Object} searchBody
@param {Object} options - from, size, scroll

@returns {BaseModel[]} - Array of instances