Method before

rpc_util.go:237–237

before is called before the call is sent to any server. If before returns a non-nil error, the RPC fails with that error.

(*callInfo)

	// before is called before the call is sent to any server.  If before
	// returns a non-nil error, the RPC fails with that error.
	before(*callInfo) error

	// after is called after the call has completed.  after cannot return an
	// error, so any failures should be reported via output parameters.