type BalancerConfig struct {
	Name   string
	Config externalserviceconfig.LoadBalancingConfig
}

type MethodConfig struct {
	// WaitForReady indicates whether RPCs sent to this method should wait until
	// the connection is ready by default (!failfast). The value specified via the
	// gRPC client API will override the value set here.
	WaitForReady *bool
	// Timeout is the default timeout for RPCs sent to this method. The actual
	// deadline used will be the minimum of the value specified here and the value
	// set by the application via the gRPC client API.  If either one is not set,
	// then the other will be used.  If neither is set, then the RPC has no deadline.
	Timeout *time.Duration
	// MaxReqSize is the maximum allowed payload size for an individual request in a
	// stream (client->server) in bytes. The size which is measured is the serialized
	// payload after per-message compression (but before stream compression) in bytes.
	// The actual value used is the minimum of the value specified here and the value set
	// by the application via the gRPC client API. If either one is not set, then the other
	// will be used.  If neither is set, then the built-in default is used.
	MaxReqSize *int
	// MaxRespSize is the maximum allowed payload size for an individual response in a
	// stream (server->client) in bytes.
	MaxRespSize *int
	// RetryPolicy configures retry options for the method.
	RetryPolicy *RetryPolicy
}

type RetryPolicy struct {
	// MaxAttempts is the maximum number of attempts, including the original RPC.
	//
	// This field is required and must be two or greater.
	MaxAttempts int

	// Exponential backoff parameters. The initial retry attempt will occur at
	// random(0, initialBackoff). In general, the nth attempt will occur at
	// random(0,
	//   min(initialBackoff*backoffMultiplier**(n-1), maxBackoff)).
	//
	// These fields are required and must be greater than zero.
	InitialBackoff    time.Duration
	MaxBackoff        time.Duration
	BackoffMultiplier float64

	// The set of status codes which may be retried.
	//
	// Status codes are specified as strings, e.g., "UNAVAILABLE".
	//
	// This field is required and must be non-empty.
	// Note: a set is used to store this for easy lookup.
	RetryableStatusCodes map[codes.Code]bool
}