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: pr_basic_ui.m
    path of file: ./repos/bspm/thirdparty/spm8/@slover/private
    
    the code of the file until where you have to start completion: function obj = pr_basic_ui(imgs, dispf)
% GUI to request parameters for slover routine
% FORMAT obj = pr_basic_ui(imgs, dispf)
%
% GUI requests choices while accepting many defaults
%
% imgs  - string or cell array of image names to display

    
function obj = pr_basic_ui(imgs, dispf)
% GUI to request parameters for slover routine
% FORMAT obj = pr_basic_ui(imgs, dispf)
%
% GUI requests choices while accepting many defaults
%
% imgs  - string or cell array of image names to display
%         (defaults to GUI select if no arguments passed)
% dispf - optional flag: if set, displays overlay (default = 1)
%
% $Id: pr_basic_ui.m,v 1.1 2005/04/20 15:05:00 matthewbrett Exp $
 
if nargin < 1
  imgs = '';
end