internal

type ConnPool interface {
	// Conn returns a ClientConn from the pool.
	//
	// Conns aren't returned to the pool.
	Conn() *grpc.ClientConn

	// Num returns the number of connections in the pool.
	//
	// It will always return the same value.
	Num() int

	// Close closes every ClientConn in the pool.
	//
	// The error returned by Close may be a single error or multiple errors.
	Close() error

	// ConnPool implements grpc.ClientConnInterface to enable it to be used directly with generated proto stubs.
	grpc.ClientConnInterface
}

type DialSettings struct {
	Endpoint          string
	DefaultEndpoint   string
	Scopes            []string
	TokenSource       oauth2.TokenSource
	Credentials       *google.Credentials
	CredentialsFile   string // if set, Token Source is ignored.
	CredentialsJSON   []byte
	UserAgent         string
	APIKey            string
	Audiences         []string
	HTTPClient        *http.Client
	GRPCDialOpts      []grpc.DialOption
	GRPCConn          *grpc.ClientConn
	GRPCConnPool      ConnPool
	GRPCConnPoolSize  int
	NoAuth            bool
	TelemetryDisabled bool
	ClientCertSource  func(*tls.CertificateRequestInfo) (*tls.Certificate, error)
	CustomClaims      map[string]interface{}

	// Google API system parameters. For more information please read:
	// https://cloud.google.com/apis/docs/system-parameters
	QuotaProject  string
	RequestReason string
}