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: grad.m
    path of file: ./repos/chebfun/@chebfun2
    
    the code of the file until where you have to start completion: function varargout = grad(varargin)
%GRAD   Gradient of a CHEBFUN2.
%   [FX FY] = GRAD(F) returns the gradient of the CHEBFUN2 F, where FX
%   is the derivative of F in the x direction and FY is the derivative in
%   the y direction. Both derivatives are returned as CHEBFUN2 objects.
%
%   G = GRAD(F) returns a CHEBFUN2V which represents
%
%            G = (F_x ; F_y )

    
function varargout = grad(varargin)
%GRAD   Gradient of a CHEBFUN2.
%   [FX FY] = GRAD(F) returns the gradient of the CHEBFUN2 F, where FX
%   is the derivative of F in the x direction and FY is the derivative in
%   the y direction. Both derivatives are returned as CHEBFUN2 objects.
%
%   G = GRAD(F) returns a CHEBFUN2V which represents
%
%            G = (F_x ; F_y )
%
%  This command is shorthand for GRADIENT(F).
%
% See also GRADIENT.

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

[varargout{1:nargout}] = grad@separableApprox(varargin{:});

end