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: testc2.m
    path of file: ./repos/SuiteSparse/GraphBLAS/Test
    
    the code of the file until where you have to start completion: function testc2(quick,use_builtin)
%TESTC2 test complex A*B, A'*B, A*B', A'*B', A+B

% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2023, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0

rng ('default') ;

if (nargin < 2)
    use_builtin = true ;
end
GB_builtin_complex_set (use_builtin) ;

if (nargin < 1)
    quick = 0 ;
end
if (quick)
    nlist = [1 4] ;
else
    nlist = [1 5 10 100] ;
end

maxerr = 0 ;
for m = nlist

    
function testc2(quick,use_builtin)
%TESTC2 test complex A*B, A'*B, A*B', A'*B', A+B

% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2023, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0

rng ('default') ;

if (nargin < 2)
    use_builtin = true ;
end
GB_builtin_complex_set (use_builtin) ;

if (nargin < 1)
    quick = 0 ;
end
if (quick)
    nlist = [1 4] ;
else
    nlist = [1 5 10 100] ;
end

maxerr = 0 ;
for m = nlist
    for n = nlist
        for k = nlist
            A = GB_mex_random (k, m, m*5, 1, 1) ;
            B = GB_mex_random (k, n, n*5, 1, 2) ;
            C = GB_mex_AdotB (A, B) ;
            C2 = A'*B  ;
            err = norm (C-C2,1) ;
            maxerr = max (maxerr, err) ;
            assert (err < 1e-12)
        end