weakly-pointed-to object becomes eligible for reclamation by the garbage
collector.
More specifically, weak pointers become nil as soon as the garbage collector
identifies that the object is unreachable, before it is made reachable
again by a finalizer.
In terms of the C# language, these semantics are roughly equivalent to the
the semantics of "short" weak references.
In terms of the Java language, these semantics are roughly equivalent to the

		t.Fatalf("error to get the server 2 port: %v", err)
	}

	// Server 1 should be reachable, since it is not closed.
	if !isTCPReachable(host, port1) {
		t.Fatal("server 1 is unreachable")
	}

	// After closing server 2, server 2 should not be reachable
	server2.httpServer.Close()
	if isTCPReachable(host, port2) {
		t.Fatal("server 2 is reachable")
	}
}

func TestSubmitCSR(t *testing.T) {

	fwdrefs   []*ssa.Value             // list of FwdRefs to be processed
	defvars   []map[ir.Node]*ssa.Value // defined variables at end of each block
	reachable []bool                   // which blocks are reachable
}

func (s *simplePhiState) insertPhis() {
	s.reachable = ssa.ReachableBlocks(s.f)

	// Find FwdRef ops.
	for _, b := range s.f.Blocks {
		for _, v := range b.Values {
			if v.Op != ssa.OpFwdRef {

			// Check if the endpoint is directly reachable. It's considered directly reachable if
			// the endpoint is either on the local network or on a remote network that can be reached
			// directly from the local network.
			if b.proxy.InNetwork(epNetwork) || len(gateways) == 0 {
				// The endpoint is directly reachable - just add it.
				// If there is no gateway, the address must not be empty

import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Consumer;

/**
 * The set of nodes reachable from a particular finalizer node.
 */
public class FinalizerGroup extends HasFinalizers {
    private static final MemberSuccessors DO_NOT_BLOCK = new DoNotBlock();
    private final TaskNode node;

import spock.lang.Specification

import static java.util.Collections.enumeration

class GradleApiSpecAggregatorTest extends Specification {

    def "will aggregate specs from all reachable GradleApiSpecProviders"() {
        given:
        def classLoader = Mock(ClassLoader)
        1 * classLoader.getResources("META-INF/services/${GradleApiSpecProvider.class.name}") >>

//
//   - The combined list of all endpoints reachable from this node (which is the union of the
//     previous two lists, but in the case where it is identical to one or the other, we avoid
//     allocating a separate list).
//
//   - An indication of whether the service has any endpoints reachable from anywhere in the
//     cluster. (This may be true even if allReachableEndpoints is empty.)

    const Graph& graph, const FunctionLibraryDefinition* function_library,
    const std::function<bool(const Graph& graph)>& predicate) {
  if (predicate(graph)) {
    return success();
  }

  // Check if any reachable functions from the graph has the target attribute.
  GraphDef graph_def;
  graph.ToGraphDef(&graph_def);
  if (!function_library) return failure();
  for (const std::string& func_name :

//   - Only a, d, e, headless, naked and vm are used as sources. (d and e applicable are only for dual-stack mode)
//   - Subtests are generated only for reachable destinations.
//   - Pod a will not be in destinations, but b will (one simpe pod not in sources)
func (t *T) WithDefaultFilters(minimumFrom, minimumTo int) *T {
	return t.
		From(FilterMatch(match.NotExternal)).

// the object is reachable until it is no longer required.
// Objects stored in global variables, or that can be found by tracing
// pointers from a global variable, are reachable. A function argument or
// receiver may become unreachable at the last point where the function
// mentions it. To make an unreachable object reachable, pass the object