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: smooth.m
    path of file: ./repos/mtex/SO3Fun/@SO3FunComposition
    
    the code of the file until where you have to start completion: function SO3F = smooth(SO3F,varargin)
% smooth SO3FunComposition
%
% Input
%  SO3F - @SO3FunComposition
%  psi  - @SO3Kernel (smoothing kernel)
%
% Options
%  halfwidth - halfwidth of the smoothing kernel
%
% Output
%  SO3F - smoothed @SO3Fun
%
% See also
% SO3Fun/smooth

    
function SO3F = smooth(SO3F,varargin)
% smooth SO3FunComposition
%
% Input
%  SO3F - @SO3FunComposition
%  psi  - @SO3Kernel (smoothing kernel)
%
% Options
%  halfwidth - halfwidth of the smoothing kernel
%
% Output
%  SO3F - smoothed @SO3Fun
%
% See also
% SO3Fun/smooth

% smooth components
for i = 1:length(SO3F.components)
  SO3F.components{i} = SO3F.components{i}.smooth(varargin{:});
end