code: def __call__(self, x: np.ndarray) -> float:
      return float(np.sum(x**2))
  
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 1 for calling the DelayedSphere obj's underlying member method code with example usage: obj.__call__(x) and returns: float