code: def test_function_built():
      new_function = function.Function(pointer)
  
      assert new_function.built is True
  
file_path: opytimizer/tests/opytimizer/core/test_function.py
imports: import numpy
  from opytimizer.core import function
  from opytimizer.utils import constant
label_desc: Use image node_id 6 for calling a global function with example usage: test_function_built() without return types