private static final Object MISSING = new Object();
    private final ConcurrentMap<String, Object> loadedClasses = new MapMaker().weakValues().makeMap();
    private final ConcurrentMap<String, Object> resources = new MapMaker().makeMap();
    private final ClassLoader parent;

    static {
        try {
            ClassLoader.registerAsParallelCapable();
        } catch (NoSuchMethodError ignore) {

    private final Map<String, Map<ComponentArtifactIdentifier, ResolvableArtifact>> cachePerRepo = new MapMaker().makeMap();
    private final Map<String, Map<ComponentArtifactIdentifier, ResolvableArtifact>> cachePerRepoWithVerification = new MapMaker().makeMap();

    /**
     * For a remote repository, the only thing required is a resolved artifact cache.

func printnl()

//go:noescape
func useT40(*T40)

type T40 struct {
	m map[int]int
}

func newT40() *T40 {
	ret := T40{}
	ret.m = make(map[int]int, 42) // ERROR "live at call to makemap: &ret$"
	return &ret
}

func bad40() {
	t := newT40() // ERROR "stack object ret T40$" "stack object .autotmp_[0-9]+ runtime.hmap$"
	printnl()     // ERROR "live at call to printnl: ret$"
	useT40(t)
}

 *
 * <p>Usage example:
 *
 * <pre>{@code
 * ConcurrentMap<Request, Stopwatch> timers = new MapMaker()
 *     .concurrencyLevel(4)
 *     .weakKeys()
 *     .makeMap();
 * }</pre>
 *
 * <p>These features are all optional; {@code new MapMaker().makeMap()} returns a valid concurrent
 * map that behaves similarly to a {@link ConcurrentHashMap}.
 *

    // GWT technically only supports concurrencyLevel == 1, but we silently
    // ignore other positive values.
    return this;
  }

  public <K, V> ConcurrentMap<K, V> makeMap() {
    return new ConcurrentHashMap<K, V>(initialCapacity);
  }

 *
 * <p>Usage example:
 *
 * <pre>{@code
 * ConcurrentMap<Request, Stopwatch> timers = new MapMaker()
 *     .concurrencyLevel(4)
 *     .weakKeys()
 *     .makeMap();
 * }</pre>
 *
 * <p>These features are all optional; {@code new MapMaker().makeMap()} returns a valid concurrent
 * map that behaves similarly to a {@link ConcurrentHashMap}.
 *

// Issue 44956: writable static temp is not exported correctly.
// In the test below, package base is
//
//     X = &map{...}
//
// which compiles to
//
//     X = &stmp           // static
//     stmp = makemap(...) // in init function
//
// plugin1 and plugin2 both import base. plugin1 doesn't use
// base.X, so that symbol is deadcoded in plugin1.
//
// plugin1 is loaded first. base.init runs at that point, which

	// Map initialization with a variable or large hint is
	// more complicated. We therefore generate a call to
	// runtime.makemap to initialize hmap and allocate the
	// map buckets.

	// When hint fits into int, use makemap instead of
	// makemap64, which is faster and shorter on 32 bit platforms.
	fnname := "makemap64"
	argtype := types.Types[types.TINT64]

	// Type checking guarantees that TIDEAL hint is positive and fits in an int.

    private final Lock lock = new ReentrantLock();
    private final Map<Class<?>, Collection<URI>> classPathCache;

    public ClasspathInferer() {
        this.classPathCache = new MapMaker().weakKeys().makeMap();
    }

    public void getClassPathFor(Class<?> targetClass, Collection<URI> dest) {
        lock.lock();
        try {
            Collection<URI> classPath = classPathCache.get(targetClass);

	{"runtime.interfaceSwitch", 1},
	{"runtime.ifaceeq", 1},
	{"runtime.efaceeq", 1},
	{"runtime.panicrangestate", 1},
	{"runtime.deferrangefunc", 1},
	{"runtime.rand32", 1},
	{"runtime.makemap64", 1},
	{"runtime.makemap", 1},
	{"runtime.makemap_small", 1},
	{"runtime.mapaccess1", 1},
	{"runtime.mapaccess1_fast32", 1},
	{"runtime.mapaccess1_fast64", 1},
	{"runtime.mapaccess1_faststr", 1},
	{"runtime.mapaccess1_fat", 1},