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: left.m
    path of file: ./repos/mtex/SO3Fun/@SO3VectorFieldHarmonic
    
    the code of the file until where you have to start completion: function SO3VF = left(SO3VF,varargin)
% change the representation of the tangent vectors to left sided
%
% Syntax

    
function SO3VF = left(SO3VF,varargin)
% change the representation of the tangent vectors to left sided
%
% Syntax
%   SO3VF = right(SO3VF)
%
% Input
%  SO3VF - @SO3VectorFieldHarmonic
%
% Output
%  SO3VF - @SO3VectorFieldHarmonic  (the evaluation directly gives left-sided tangent vectors)
%

if strcmp(SO3VF.tangentSpace,'left')
  return
end