}

// Builder builds Istio authorization policy to Envoy filters.
type Builder struct {
	trustDomainBundle trustdomain.Bundle
	option            Option

	// populated when building for CUSTOM action.
	customPolicies []model.AuthorizationPolicy
	extensions     map[string]*builtExtAuthz

	// populated when building for ALLOW/DENY/AUDIT action.
	denyPolicies  []model.AuthorizationPolicy
	allowPolicies []model.AuthorizationPolicy