code: func NewRulesCache() *RulesCache {
  	return &RulesCache{
  		policy: policy.Policy{
  			Name:     delegationCfg,        // used as part of datastore keys
  			Fetch:    fetchConfigs,         // see below
  			Validate: validateConfigBundle, // see config_validation.go
  			Prepare:  prepareRules,         // see below
  		},
  	}
  }
docs: // NewRulesCache properly initializes RulesCache instance.