@Override
  public void getPageBuffer(ByteBuffer dst) {
    this.pageBuffer.clear();
    dst.put(this.pageBuffer);
  }
Implementing marking deletion will not modify {@linkplain #memberNum} nor truncate {@linkplain
#segOffsetLst}.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/pbtree/schemafile/SegmentedPage.java