docstr: Number of entries or other nodes connected to the node.
docstr_tok: ["Number","of","entries","or","other","nodes","connected","to","the","node","."]
code: def num_children(self) -> int:
      """Number of entries or other nodes connected to the node."""
      return 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 11 for calling the Node obj's underlying member method code with example usage: obj.num_children() and returns: len