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: surf.m
    path of file: ./repos/chebfun/@chebfun2v
    
    the code of the file until where you have to start completion: function varargout = surf(F, varargin)
%SURF Plot of the surface represented by a CHEBFUN2V.
%
% SURF(F) is the surface plot of F, where F is a CHEBFUN2V with three
% components.
%
% SURF(F,'-') also shows the seams of the parameterisation on the surface.
%

    
function varargout = surf(F, varargin)
%SURF Plot of the surface represented by a CHEBFUN2V.
%
% SURF(F) is the surface plot of F, where F is a CHEBFUN2V with three
% components.
%
% SURF(F,'-') also shows the seams of the parameterisation on the surface.
%
% SURF(F,...) allows for the same plotting options as Matlab's SURF
% command.
%
% See also CHEBFUN2/SURF.

% Copyright 2017 by The University of Oxford and The Chebfun Developers.
% See http://www.chebfun.org/ for Chebfun information.

numpts = 100; 

% Empty check:
if ( isempty(F) )
    surf([]);
    return
end