code: def test_lsa_update_direction():
      def square(x):
          return np.sum(x**2)
  
      search_space = search.SearchSpace(
          n_agents=10,
          n_variables=2,
          lower_bound=[0, 0],
          upper_bound=[10, 10],
      )
  
      new_lsa = lsa.LSA()
      new_lsa.compile(search_space)
  
      new_lsa._update_direction(search_space.agents[0], square)
  
file_path: opytimizer/tests/opytimizer/optimizers/science/test_lsa.py
imports: import numpy
  from opytimizer.optimizers.science import lsa
  from opytimizer.spaces import search
label_desc: Use image node_id 4 for calling a global function with example usage: test_lsa_update_direction() and returns: np