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: getscreen.m
    path of file: ./repos/brainstorm3/external/other
    
    the code of the file until where you have to start completion: function [X,m]=getscreen(varargin)
%GETSCREEN replacement for GETFRAME for systems with multiple monitors. Use it just like you use GETFRAME.
%Can also be used to take screenshots of non-MATLAB windows. Requires JAVA.
%
%Calling options:

    
function [X,m]=getscreen(varargin)
%GETSCREEN replacement for GETFRAME for systems with multiple monitors. Use it just like you use GETFRAME.
%Can also be used to take screenshots of non-MATLAB windows. Requires JAVA.
%
%Calling options:
% Output X is m*n*3 cdata array. Output m is corresponding colormap (if applicable.)
% [X,m]=getscreen         Gets screenshot of current figure
% [X,m]=getscreen(h)      Gets screenshot of axes or figure with handle h
% [X,m]=getscreen(h,rect) Gets screenshot of at position rect relative to axes or figure with handle h.
% [X,m]=getscreen(rect) Gets screenshot of whatever is on your screen at position vector rect. (Relative to bottom left corner.)
%   rect is a 4 element position vector in pixel units, referenced from bottom left as usual for MATLAB.
%
% By Matt Daskilewicz <mattdaskil@gatech.edu> 11/2008
% www.asdl.gatech.edu
%


%process inputs:
if nargin==0
    h=gcf;
    rect=get(h,'position');
    rect(1:2)=[0 0];

elseif nargin==1
    if numel(varargin{1})==1 %it should be a handle
        h=varargin{1};
        if ~strcmp(get(h,'type'),'axes') && ~strcmp(get(h,'type'),'figure')
            error('First input must be a handle to an axes or figure, or a position vector');
        end