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: cifti.m
    path of file: ./repos/spm12/@nifti
    
    the code of the file until where you have to start completion: function [C,OutputFiles] = cifti(obj)
% Extract CIFTI-2 extension from a NIfTI-2 file and export data
%__________________________________________________________________________
% Copyright (C) 2019 Wellcome Trust Centre for Neuroimaging


    
function [C,OutputFiles] = cifti(obj)
% Extract CIFTI-2 extension from a NIfTI-2 file and export data
%__________________________________________________________________________
% Copyright (C) 2019 Wellcome Trust Centre for Neuroimaging


C = [];
OutputFiles = {};

%-Check input is a CIFTI file
%--------------------------------------------------------------------------
if ~isfield(obj.hdr,'ext') || isempty(obj.hdr.ext) || obj.hdr.ext.ecode ~= 32
    return;
end