class_docstr: A generator of a grid of points with a bounded L1 norm.
code: def build_integer_grid(self, n_units):
      # initialize working variables for the grid accumulation
      self.entry = np.zeros(self.dim)
      self.accumulator = []
      # recursively create the integer grid
      self.accumulate_integer_grid(0, n_units)
      return self.accumulator
  
imports: import logging
  import numpy
  import pandas
label_desc: Use image node_id 2 for calling the _GridGenerator obj's underlying member method code with example usage: obj.build_integer_grid(n_units) and returns: self