code: def lognormal(mu, sigma, rng=None, size=()):
      draw = rng.normal(mu, sigma, size=size)
      return np.exp(draw)
  
imports: import sys
  import numpy
  from .base import scope, as_apply, dfs, rec_eval, clone
label_desc: Use image node_id 10 for calling a global function with example usage: lognormal(mu, sigma, rng, size) and returns: np