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: save.m
    path of file: ./repos/spm12/@gifti
    
    the code of the file until where you have to start completion: function save(this,filename,encoding)
% Save GIfTI object in a GIfTI format file
% FORMAT save(this,filename,encoding)
% this      - GIfTI object
% filename  - name of GIfTI file to be created [Default: 'untitled.gii']
% encoding  - optional argument to specify encoding format, among
%             ASCII, Base64Binary, GZipBase64Binary, ExternalFileBinary.
%             [Default: 'GZipBase64Binary']
%___________
    
function fid = save_gii(fid,this,encoding)
%==========================================================================
function fid = save_gii(fid,this,encoding)

% Defaults for DataArray's attributes
%--------------------------------------------------------------------------
[unused,unused,mach]   = fopen(fid);
if strncmp('ieee-be',mach,7)
    def.Endian         = 'BigEndian';
elseif strncmp('ieee-le',mach,7)
    def.Endian         = 'LittleEndian';
else
    error('[GIFTI] Unknown byte order "%s".',mach);
end