code: def set_matrix_dimensions(self, bounds, xdensity, ydensity):
          
          self.bounds = bounds
          self.xdensity = xdensity
          self.ydensity = ydensity
          scs = SheetCoordinateSystem(bounds, xdensity, ydensity)
          for of in self.output_fns:
              if isinstance(of, TransferFn):
                  of.initialize(SCS=scs, shape=scs.shape)
docs: Change the dimensions of the matrix into which the pattern
          will be drawn.  Users of this class should call this method
          rather than changing the bounds, xdensity, and ydensity
          parameters directly.  Subclasses can override this method to
          update any internal data structures that may depend on the
          matrix dimensions.