code: def _get_posterior_vff(kernel, inducing_variable):
      return VFFPosterior
  
imports: import numpy
  import tensorflow
  from check_shapes import Shape
  import gpflow
  from gpflow import covariances
  from gpflow import kullback_leiblers
  from gpflow.base import TensorLike
  from gpflow.ci_utils import reduce_in_tests
  from gpflow.inducing_variables import InducingVariables
  from gpflow.utilities import to_default_float
  import matplotlib.pyplot
  import gpflow.posteriors
label_desc: Use image node_id 7 for calling a global function with example usage: _get_posterior_vff(kernel, inducing_variable) and returns: VFFPosterior