code: def stepdoublelinearslope(x: np.ndarray) -> float:
      return step(np.abs(np.sum(x)))
  
imports: from math import exp, sqrt, tanh
  import numpy
  import nevergrad.common.typing
  from nevergrad.common.decorators import Registry
label_desc: Use image node_id 20 for calling a global function with example usage: stepdoublelinearslope(x) and returns: step