code: def test_tree_space_grow():
      new_tree_space = tree.TreeSpace(
          1,
          1,
          0,
          1,
          min_depth=1,
          max_depth=5,
          functions=["SUM", "SUB", "MUL", "DIV"],
      )
  
      new_tree = new_tree_space.grow(
          new_tree_space.min_depth, new_tree_space.max_depth
      )
  
      assert isinstance(new_tree, node.Node)
  
imports: from opytimizer.core import node
  from opytimizer.spaces import tree
label_desc: Use image node_id 18 for calling a global function with example usage: test_tree_space_grow() without return types