code: def negated(f):
      """Decorator to negate f such that f'(x) = -f(x)."""
  
      @wraps(f)
      def wrapped_f(*args, **kwargs):
          return -f(*args, **kwargs)
  
      return wrapped_f
  
imports: import collections
  import functools
  import threading
  import operator
label_desc: Use image node_id 3 for calling a global function with example usage: negated(f) and returns: wrapped_f, unknown