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: S2FunHarmonicSym.m
    path of file: ./repos/mtex/S2Fun/@S2FunHarmonicSym
    
    the code of the file until where you have to start completion: classdef S2FunHarmonicSym < S2FunHarmonic
% a class represeneting a symmetrised function on the sphere

pro
    
function on the sphere

properties
  s = []; % symmetry
end

properties (Dependent = true)
  CS
  SS 
end


methods
  function sF = S2FunHarmonicSym(fhat, s)
    if nargin == 0, return; end