@VisibleForTesting
    static boolean validateArenaBlockSize(long arenaBlockSize, long mutableLimit) {
        return arenaBlockSize <= mutableLimit;
    }
@Test
    public void testValidateArenaBlockSize() {
        long arenaBlockSize = 8 * 1024 * 1024;
        assertFalse(
                ForStMemoryControllerUtils.validateArenaBlockSize(
                        arenaBlockSize, (long) (arenaBlockSize * 0.5)));
        assertTrue(
                ForStMemoryControllerUtils.validateArenaBlockSize(
                        arenaBlockSize, (long) (arenaBlockSize * 1.5)));
    }