%% purge
%    Removes useless data from the block on saving, avoiding unnecessary
%    changes and data storage.
% inputs:
%   object - Grid object
% outputs:
%   none
% Author: Matthew Dawson <matthew@mjdsystems.ca>
% Organization: McMaster Centre for Software Certification
function purge( object )
% delete(object.new_cell_pb)
% delete(object.delete_cell_pb)
object.new_cell_pb = [];
object.delete_cell_pb = [];

for i=1:size(object.cells, 2)
    object.cells(i).purge
end

end