@Override
    protected void writeInt64LE(long value) throws IOException {
        ensureCapacity(8);
        int position = nioBuffer.position();
        UnsafeDirectBufferUtil.setLongLE(address(position), value);
        BufferUtils.position(nioBuffer, position + 8);
    }
Start address of the memory buffer The memory buffer should be non-movable, which normally means that is is allocated
off-heap
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/serialization/impl/protostuff/io/UnsafeNioBufOutput.java