p.connected = nil
	}
}

func (p *XdsProxy) registerStream(c *ProxyConnection) {
	p.connectedMutex.Lock()
	defer p.connectedMutex.Unlock()
	if p.connected != nil {
		proxyLog.Warnf("registered overlapping stream; closing previous")
		close(p.connected.stopChan)
	}
	p.connected = c
}

// ProxyConnection represents connection to downstream proxy.
type ProxyConnection struct {
	conID              uint32

		return
	}

	// The addresses must not overlap. Easiest test: require monotonicity.
	if lastAddr, ok := p.dataAddr[name]; ok && nameAddr.Offset < lastAddr {
		p.errorf("overlapping DATA entry for %s", name)
		return
	}
	p.dataAddr[name] = nameAddr.Offset + int64(sz)

	switch valueAddr.Type {
	case obj.TYPE_CONST:
		switch sz {
		case 1, 2, 4, 8:

	s3 := append(s2, s0...)            // append a slice              s3 == []int{0, 0, 2, 3, 5, 7, 0, 0}
	s4 := append(s3[3:6], s3[2:]...)   // append overlapping slice    s4 == []int{3, 5, 7, 2, 3, 5, 7, 0, 0}

	var t []interface{}
	t = append(t, 42, 3.1415, "foo")   //                             t == []interface{}{42, 3.1415, "foo"}

	var b []byte

	// Description: A VirtualService rule match duplicates a match in a previous rule.
	VirtualServiceIneffectiveMatch = diag.NewMessageType(diag.Info, "IST0131", "VirtualService rule %v match %v is not used (duplicate/overlapping match in rule %v).")

	// VirtualServiceHostNotFoundInGateway defines a diag.MessageType for message "VirtualServiceHostNotFoundInGateway".
	// Description: Host defined in VirtualService not found in Gateway.

	for _, vs := range virtualServices {
		v := vs.Spec.(*networking.VirtualService)
		for _, h := range v.Hosts {
			// We may have duplicate (not just overlapping) hosts; assume the list of VS is sorted already
			// and never overwrite existing entries
			if host.Name(h).IsWildCarded() {
				_, exists := wildcardVirtualServiceHostIndex[host.Name(h)]
				if !exists {

	//
	// In the second case, multiple services may be implemented by the same physical port number,
	// though with a different ServicePort and IstioEndpoint for each.  If any of these overlapping
	// services are not HTTP or H2-based, behavior is undefined, since the listener may not be able to
	// determine the intended destination of a connection without a Host header on the request.

        return DocumentOverlayResult(resultDocument, overlayOriginContainer, overlayResolutionContainer)
    }
}


/**
 * Represents the results of overlaying declarative documents.
 * * [document] is the resulting document content;
 * * [overlayNodeOriginContainer] tells where a node comes from – overlay, underlay, or combined.