%arrangePortBlocks Arrange port blocks within subsystem.
%   arrangePortBlocks(portBlocksOrSubsystem) arranges the given port
%   blocks, or all port blocks within a given subsystem.
%   portBlocksOrSubsystem can either contain the port blocks to be arranged
%   or a subsystem in which all port blocks are to be arranged. If port
%   blocks are given, they must all be in the same subsystem and can be
%   given either as an array of handles or as a cell array of full Simulink
%   paths. If all port blocks within one subsystem are to be arranged, that
%   subsystem can be given as either a single handle or a single full
%   Simulink path.
