code: function whereIn(column, values) {
      if (Array.isArray(values) && isEmpty(values)) {
        return this.where(this._not());
      }
      this._statements.push({
        grouping: 'where',
        type: 'whereIn',
        column: column,
        value: values,
        not: this._not(),
        bool: this._bool()
      });
      return this;
    }
docs: Adds a `where in` clause to the query.