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: ft_hash.m
    path of file: ./repos/fieldtrip/utilities
    
    the code of the file until where you have to start completion: function h = ft_hash(s)

% FT_HASH computes a MD5 hash from a MATLAB variable or structure
%

    
function h = ft_hash(s)

% FT_HASH computes a MD5 hash from a MATLAB variable or structure
%
% It will first try a hashing algorithm implemented as a mex file.
% If that fails, it falls back to a slower one that is based on Java.

% both CalcMD5 and DataHash are from Mathworks file exchange
ft_hastoolbox('fileexchange', 1);

try
  % this one uses a mex file
  if isstruct(s) || iscell(s) || istable(s)
    h = CalcMD5(mxSerialize(s));
  else
    h = CalcMD5(s);
  end