}

// IsHTTPS is true if protocol is HTTPS
func (i Instance) IsHTTPS() bool {
	switch i {
	case HTTPS:
		return true
	default:
		return false
	}
}

// IsGRPC is true for GRPC protocols.
func (i Instance) IsGRPC() bool {
	switch i {
	case GRPC, GRPCWeb:
		return true
	default:
		return false
	}
}

func (i Instance) IsUnsupported() bool {
	return i == Unsupported
}

		}))

	return checkRequest(opts, expectAllowed, checkHeaders)
}

func checkRequest(opts echo.CallOptions, expectAllowed bool, checkHeaders echo.Checker) echo.Checker {
	switch {
	case opts.Port.Protocol.IsGRPC():
		switch opts.HTTP.Headers.Get(XExtAuthz) {
		case XExtAuthzAllow:
			return check.And(check.NoError(), checkHeaders)
		default:
			// Deny
			return check.And(check.Forbidden(protocol.GRPC),