code: def projection(self, coef, alpha, L):
      return project_simplex(coef[0]).reshape(1, -1)
  
imports: import numpy
  from scipy.linalg import svd
  from lightning.impl.prox_fast import prox_tv1d
label_desc: Use image node_id 1 for calling the SimplexConstraint obj's underlying member method code with example usage: obj.projection(coef, alpha, L) and returns: project_simplex