class_docstr: A TreeSpace class for trees, agents, variables and methods
  related to a tree-based search space.
class_docstr_tok: ["A","TreeSpace","class","for","trees",",","agents",",","variables","and","methods","related","to","a","tree-based","search","space","."]
docstr: Best tree.
docstr_tok: ["Best","tree","."]
code: def best_tree(self) -> Node:
      """Best tree."""
  
      return self._best_tree
  
imports: import copy
  from typing import List, Optional, Tuple, Union
  import numpy
  import opytimizer.math.random
  import opytimizer.utils.constant
  import opytimizer.utils.exception
  from opytimizer.core import Agent, Node, Space
  from opytimizer.utils import logging
label_desc: Use image node_id 14 for calling the TreeSpace obj's underlying member method code with example usage: obj.best_tree() and returns: self