func (c CallMethodInfo) ClientStream() bool {
	return c.t == callClientStream || c.t == callBidirStream
}
ClientStream checks if CallMethodInfo contains
information about the client-side streaming RPC.
package common
type callType uint8
const (
	_ callType = iota
	callUnary
	callClientStream
	callServerStream
	callBidirStream
)
type CallMethodInfo struct {
	Service string
	Name string
	t callType
}
func (c CallMethodInfo) ServerStream() bool {
	return c.t == callServerStream || c.t == callBidirStream
}