docstr: Find indexes of the sorted sampling points
code: def sorted_samples(self):  # Validated
      """Find indexes of the sorted sampling points"""
      self.Ind_sorted = np.argsort(self.C, axis=0)
      self.Xs = self.C[self.Ind_sorted]
      return self.Ind_sorted, self.Xs
  
imports: from collections import namedtuple
  import time
  import logging
  import warnings
  import sys
  import numpy
  from scipy import spatial
  from scipy.optimize import OptimizeResult, minimize, Bounds
  from scipy.optimize._optimize import MemoizeJac
  from scipy.optimize._constraints import new_bounds_to_old
  from scipy.optimize._minimize import standardize_constraints
  from scipy._lib._util import _FunctionWrapper
  from scipy.optimize._shgo_lib._complex import Complex
label_desc: Use image node_id 31 for calling the SHGO obj's underlying member method code with example usage: obj.sorted_samples() and returns: self,  self