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: floor.m
    path of file: ./repos/chebfun/@classicfun
    
    the code of the file until where you have to start completion: function f = floor(f)

    
function f = floor(f)
%FLOOR   Pointwise floor function of a CLASSICFUN.
%   G = FLOOR(F) returns the CLASSICFUN G such that G(X) = FLOOR(F(x)) for each x in
%   F.domain. 
%
%   If F is complex, then the G = FLOOR(REAL(F)) + 1i*FLOOR(IMAG(F)).
%
%   Note that FLOOR() assumes the output G(X) is a constant. If it is not, then
%   garbage is returned with no warning.
%
% See also CEIL, ROUND, FIX.

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

% FLOOR() the ONEFUN:
f.onefun = floor(f.onefun);

end