code: def fun_peak(self, x, y):
      eps = 1e-3
      return np.vstack(
          (y[1], -(4 * x * y[1] + 2 * y[0]) / (eps + x**2))
      )
  
imports: import numpy
  from .common import Benchmark, safe_import
  from scipy.integrate import quad, cumulative_simpson
label_desc: Use image node_id 4 for calling the SolveBVP obj's underlying member method code with example usage: obj.fun_peak(x, y) and returns: np