code: def _add(self, f, g):
      assert f.kernel is g.kernel
      return RKHSFun(f.kernel, add_dicts(f.alphas, g.alphas))
  
imports: from __future__ import print_function
  import autograd.numpy
  import autograd.numpy.random
  from autograd.extend import primitive, defvjp, defjvp, VSpace, Box
  from autograd.util import func
  from autograd import grad
label_desc: Use image node_id 4 for calling the RKHSFunVSpace obj's underlying member method code with example usage: obj._add(f, g) and returns: RKHSFun