code: function getRefModel (path) {
    let model
    if (this.schema.refs) {
      const modelName = this.schema.refs[path].ref
      if (modelName) {
        const l = this[_privateKey] && this[_privateKey].lounge
          ? this[_privateKey].lounge
          : this.lounge
        model = l.models[modelName]
      }
    }
  
    return model
  }
docs: /*!
  Gets the model at a reference path
  Has to be called with the context
  Can work against an instance or a Model class as static function
  @param {String} path
  @returns {*}