public void copyMemory(final Object srcBase, final long srcOffset, final Object dstBase, final long dstOffset,
                               final long bytes) {
            this.unsafe.copyMemory(srcBase, srcOffset, dstBase, dstOffset, bytes);
        }
Returns the {@link sun.misc.Unsafe}'s instance.
jraft-core/src/main/java/com/alipay/sofa/jraft/util/internal/UnsafeUtil.java