rhino/src/main/java/org/mozilla/javascript/PolicySecurityController.java [105:130]:
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        Map<ClassLoader, SoftReference<SecureCaller>> classLoaderMap;
        synchronized (callers) {
            classLoaderMap = callers.get(codeSource);
            if (classLoaderMap == null) {
                classLoaderMap = new WeakHashMap<>();
                callers.put(codeSource, classLoaderMap);
            }
        }
        SecureCaller caller;
        synchronized (classLoaderMap) {
            SoftReference<SecureCaller> ref = classLoaderMap.get(classLoader);
            if (ref != null) {
                caller = ref.get();
            } else {
                caller = null;
            }
            if (caller == null) {
                try {
                    // Run in doPrivileged as we'll be checked for
                    // "createClassLoader" runtime permission
                    caller =
                            (SecureCaller)
                                    AccessController.doPrivileged(
                                            new PrivilegedExceptionAction<Object>() {
                                                @Override
                                                public Object run() throws Exception {
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rhino/src/main/java/org/mozilla/javascript/SecureCaller.java [60:85]:
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        Map<ClassLoader, SoftReference<SecureCaller>> classLoaderMap;
        synchronized (callers) {
            classLoaderMap = callers.get(codeSource);
            if (classLoaderMap == null) {
                classLoaderMap = new WeakHashMap<>();
                callers.put(codeSource, classLoaderMap);
            }
        }
        SecureCaller caller;
        synchronized (classLoaderMap) {
            SoftReference<SecureCaller> ref = classLoaderMap.get(classLoader);
            if (ref != null) {
                caller = ref.get();
            } else {
                caller = null;
            }
            if (caller == null) {
                try {
                    // Run in doPrivileged as we'll be checked for
                    // "createClassLoader" runtime permission
                    caller =
                            (SecureCaller)
                                    AccessController.doPrivileged(
                                            new PrivilegedExceptionAction<Object>() {
                                                @Override
                                                public Object run() throws Exception {
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