class_docstr: Hessian update strategy with full dimensional internal representation.
      
class_docstr_tok: ["Hessian","update","strategy","with","full","dimensional","internal","representation","."]
code: def _update_implementation(self, delta_x, delta_grad):
      raise NotImplementedError(
          "The method ``_update_implementation``" " is not implemented."
      )
  
imports: import numpy
  from numpy.linalg import norm
  from scipy.linalg import get_blas_funcs
  from warnings import warn
label_desc: Use image node_id 4 for calling the FullHessianUpdateStrategy obj's underlying member method code with example usage: obj._update_implementation(delta_x, delta_grad) without return types