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: copy_varargin.m
    path of file: ./repos/BRAPH-2/braph2/src/util
    
    the code of the file until where you have to start completion: function varargin_copy = copy_varargin(varargin)
%COPY_VARARGIN deep copies varargin.

    
function varargin_copy = copy_varargin(varargin)
%COPY_VARARGIN deep copies varargin.
%
% COPY = COPY_VARARGIN(VARARGIN) deep copy of VARARGIN, where VARARGIN is
%  passed as a cell array. All copiable objects will be deep-copied (i.e.,
%  the method copy() is called for all objects that have it).
%  VARARGIN is be passed as a cell array.
%
% COPY = COPY_VARARGIN('PropertyName', PROPERTY, ... ) VARARGIN can also be
%  passed as a list of couples, each including a 'PropertyName' and a PROPERTY.
%
% See also get_from_varargin, remove_from_varargin,
%  get_and_remove_from_varargin, clean_varargin.

if length(varargin) == 1
    varargin = varargin{:};
end