class_docstr: Analogous to a gridspec, and contained in another LayoutGrid.
class_docstr_tok: ["Analogous","to","a","gridspec",",","and","contained","in","another","LayoutGrid","."]
code: def __repr__(self):
      str = f"LayoutBox: {self.name:25s} {self.nrows}x{self.ncols},\n"
      for i in range(self.nrows):
          for j in range(self.ncols):
              str += (
                  f"{i}, {j}: "
                  f"L{self.lefts[j].value():1.3f}, "
                  f"B{self.bottoms[i].value():1.3f}, "
                  f"R{self.rights[j].value():1.3f}, "
                  f"T{self.tops[i].value():1.3f}, "
                  f'ML{self.margins["left"][j].value():1.3f}, '
                  f'MR{self.margins["right"][j].value():1.3f}, '
                  f'MB{self.margins["bottom"][i].value():1.3f}, '
                  f'MT{self.margins["top"][i].value():1.3f}, \n'
              )
      return str
  
imports: import itertools
  import kiwisolver
  import logging
  import numpy
  import matplotlib
  import matplotlib.patches
  from matplotlib.transforms import Bbox
label_desc: Use image node_id 2 for calling the LayoutGrid obj's underlying member method code with example usage: obj.__repr__() and returns: str