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: isempty.m
    path of file: ./repos/chebfun/@ballfunv
    
    the code of the file until where you have to start completion: function out = isempty(F)
%ISEMPTY   Empty boolean check for a BALLFUNV object. 
%   ISEMPTY(F) returns 1 if every component of F is an empty BALLFUNV, and
%   returns 0 otherwise.


    
function out = isempty(F)
%ISEMPTY   Empty boolean check for a BALLFUNV object. 
%   ISEMPTY(F) returns 1 if every component of F is an empty BALLFUNV, and
%   returns 0 otherwise.

% Copyright 2019 by The University of Oxford and The Chebfun Developers.
% See http://www.chebfun.org/ for Chebfun information.

if ( isempty( F.comp) ) 
    out = 1; 
    return
end