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: Neural_demo.m
    path of file: ./repos/spm/toolbox/Neural_Models
    
    the code of the file until where you have to start completion: function varargout = Neural_demo(varargin)
% NEURAL_DEMO M-file for Neural_demo.fig
%      NEURAL_DEMO, by itself, creates a new NEURAL_DEMO or raises the existing
%      singleton*.
%
%      H = NEURAL_DEMO returns the handle to a new NEURAL_DEMO or the handle to
%      the existing singleton*.
%
%      NEURAL_DEMO('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in NEURAL_DEMO.M with the given input arguments.
%
%      NEURAL_DEMO('Property','Value',...) creates a new NEURAL_DEMO or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before Neural_demo_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to Neural_demo_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help Neural_demo

    
function varargout = Neural_demo(varargin)
% NEURAL_DEMO M-file for Neural_demo.fig
%      NEURAL_DEMO, by itself, creates a new NEURAL_DEMO or raises the existing
%      singleton*.
%
%      H = NEURAL_DEMO returns the handle to a new NEURAL_DEMO or the handle to
%      the existing singleton*.
%
%      NEURAL_DEMO('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in NEURAL_DEMO.M with the given input arguments.
%
%      NEURAL_DEMO('Property','Value',...) creates a new NEURAL_DEMO or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before Neural_demo_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to Neural_demo_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help Neural_demo

% Last Modified by GUIDE v2.5 28-Jan-2018 17:01:08

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @Neural_demo_OpeningFcn, ...
                   'gui_OutputFcn',  @Neural_demo_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end