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: loadobj.m
    path of file: ./repos/fit/FITv2.0e/ica_fuse/ica_fuse_spm_files/@ica_fuse_file_array
    
    the code of the file until where you have to start completion: function b = loadobj(a)
% loadobj for file_array class
% _______________________________________________________________________
% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

%
% $Id: loadobj.m 1544 2008-05-06 10:34:36Z guillaume $

if isa(a,'ica_fuse_file_array')
    b = a;

    
function b = loadobj(a)
% loadobj for file_array class
% _______________________________________________________________________
% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

%
% $Id: loadobj.m 1544 2008-05-06 10:34:36Z guillaume $

if isa(a,'ica_fuse_file_array')
    b = a;
else
    a = permission(a, 'rw');
    b = ica_fuse_file_array(a);
end