new SecurityManager() {
          @Override
          public void checkAccess(Thread t) {
            throw new SecurityException();
          }

          @Override
          public void checkPermission(Permission perm) {
            // Do nothing so we can clear the security manager at the end
          }
        });
    try {
      final String oldName = Thread.currentThread().getName();

                    assert getClass().getName().equals(System.getProperty("java.security.manager"));
                }

                @Override
                public void checkPermission(Permission permission) {
                }
            }
        """.stripIndent()
        buildFile << """
            java {
                toolchain {

                public void testSecurityManagerCleanExit() {
                    System.setSecurityManager(new SecurityManager() {
                        @Override
                        public void checkPermission(Permission perm) {
                            if ("setSecurityManager".equals(perm.getName())) {
                                throw new SecurityException("You cannot replace this security manager!");

      }
    }
    assertThat(file).isNotNull();
    SecurityManager disallowFilesSecurityManager =
        new SecurityManager() {
          @Override
          public void checkPermission(Permission p) {
            if (readClassPathFiles.implies(p)) {
              throw new SecurityException("Disallowed: " + p);
            }
          }
        };