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: mtexCifPath.m
    path of file: ./repos/mtex/tools/pathes
    
    the code of the file until where you have to start completion: function p = mtexCifPath
% returns the default path to crystallographic information files (CIF)
%
% Syntax

    
function p = mtexCifPath
% returns the default path to crystallographic information files (CIF)
%
% Syntax
%   mtexCifPath 
%   getMTEXpref('CIFPath') % long form of mtexCifPath
%   setMTEXpref('CIFPath',path) % change the path to CIF files
%
% See also
% mtexDataPath mtexCifPath mtexEBSDPath mtexPoleFigurePath mtexODFPath
% mtexTensorPath

DataPath = getMTEXpref('CIFPath');

if exist(DataPath,'dir')
  p = DataPath;
else
  error('Data package not installed!');
end