static SchemaPage initInternalPage(ByteBuffer buffer, int pageIndex, int ptr) {
    return initInternalPage(
        buffer, pageIndex, ptr, new AtomicInteger(), new ReentrantReadWriteLock());
  }
InternalPage should be initiated with a pointer which points to the minimal child of it.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/pbtree/schemafile/ISchemaPage.java