code: def updateAssetsGrid(self):
          '''
          Updates this agent's end-of-period assets grid by constructing a multi-
          exponentially spaced grid of aXtra values.
  
          Parameters
          ----------
          none
  
          Returns
          -------
          none
          '''
          aXtraGrid = constructAssetsGrid(self)
          self.aXtraGrid = aXtraGrid
          self.addToTimeInv('aXtraGrid'f updateAssetsGrid(self):
          '''
          Updates this agent's end-of-period assets grid by constructing a multi-
          exponentially spaced grid of aXtra values.
  
          Parameters
          ----------
          none
  
          Returns
          -------
          none
          '''
          aXtraGrid = constructAssetsGrid(self)
          self.aXtraGrid = aXtraGrid
          self.addToTimeInv('aXtraGrid')
docs: Updates this agent's end-of-period assets grid by constructing a multi-
          exponentially spaced grid of aXtra values.
  
          Parameters
          ----------
          none
  
          Returns
          -------
          none