You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cache_test.m
    path of file: ./repos/gptoolbox/utility
    
    the code of the file until where you have to start completion: function C = cache_test(A,B)
  % CACHE_TEST Dummy program that computes C = A+B, but demonstrates how to use
  % md5 caching of function results on input parameters
  %
  % C = cache_test(A,B)
  %

    
function C = cache_test(A,B)
  % CACHE_TEST Dummy program that computes C = A+B, but demonstrates how to use
  % md5 caching of function results on input parameters
  %
  % C = cache_test(A,B)
  %

  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % Check for cached result, do NOT edit variables until cache is checked,
  % your function code comes later. See below
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % get a list of current variables in this scope, this is the input "state"
  variables = who;
  % get a temporary file's name
  tmpf = [tempname('.') '.mat'];
  % save the "state" to file, so we can get a md5 checksum
  save(tmpf,'-regexp',sprintf('^%s$|',variables{:}),'-ascii');
  % get md5 checksum on input "state", we append