code: def jvp(func, primals, tangents):
      """Compute a (forward-mode) Jacobian-vector product of `func`.
  
      Parameters
      ----------
      func : callable
          Function to be differentiated.
      primals
          sequence of primal values at which the Jacobian of `func` should be evaluated.
      tangents
          sequence of tangent vectors giving the Jacobian-vector product of `func`
          evaluated at `primals`.
  
      Returns
      -------
      ret
          The output of `func` evaluated at `primals`. And the Jacobian-vector product of
          function evaluated at primals with tangents.
      """
      return current_backend(None).jvp(func, primals, tangents)
  
label_desc: Use image node_id 3 for calling a global function with example usage: jvp(func, primals, tangents) and returns: current_backend