const (
    // Infinity is the maximum possible duration for keepalive values
    Infinity = time.Duration(math.MaxInt64)
)

type Options struct {
    // After a duration of this time if the server/client doesn't see any activity it pings the peer to see if the transport is still alive.
    Time time.Duration
    // After having pinged for keepalive check, the server waits for a duration of Timeout and if no activity is seen even after that
    // the connection is closed.
    Timeout time.Duration
    // MaxServerConnectionAge is a duration for the maximum amount of time a
    // connection may exist before it will be closed by the server sending a GoAway.
    // A random jitter is added to spread out connection storms.
    // See https://github.com/grpc/grpc-go/blob/bd0b3b2aa2a9c87b323ee812359b0e9cda680dad/keepalive/keepalive.go#L49
    MaxServerConnectionAge time.Duration // default value is infinity
    // MaxServerConnectionAgeGrace is an additive period after MaxServerConnectionAge
    // after which the connection will be forcibly closed by the server.
    MaxServerConnectionAgeGrace time.Duration // default value 10s
}