code: def __repr__(self):
      return "<{}: page={} entries={}>".format(
          self.__class__.__name__, self.page, len(self.entries)
      )
  
imports: import abc
  import bisect
  import math
  from typing import Optional
  from .const import ENDIAN, NODE_TYPE_BYTES, USED_PAGE_LENGTH_BYTES, PAGE_REFERENCE_BYTES, TreeConf
  from .entry import Entry, Record, Reference, OpaqueData
label_desc: Use image node_id 20 for calling the Node obj's underlying member method code with example usage: obj.__repr__() and returns: str