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: gb_isfull.m
    path of file: ./repos/SuiteSparse/GraphBLAS/GraphBLAS/@GrB/private
    
    the code of the file until where you have to start completion: function s = gb_isfull (A)
%GB_ISFULL determine if all entries are present in a GraphBLAS struct.

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

[m, n] = gbsize (A) ;
if (isinteger (m))
    % gbsize returms m and n as integer if either m or n are larger
    % than flintmax.  In this case, A must be sparse.

    
function s = gb_isfull (A)
%GB_ISFULL determine if all entries are present in a GraphBLAS struct.

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

[m, n] = gbsize (A) ;
if (isinteger (m))
    % gbsize returms m and n as integer if either m or n are larger
    % than flintmax.  In this case, A must be sparse.
    s = false ;
else
    s = (m*n == gbnvals (A)) ;
end