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: FourierDistribution.m
    path of file: ./repos/libDirectional/lib/distributions/Hypertorus/Circle
    
    the code of the file until where you have to start completion: classdef FourierDistribution < AbstractCircularDistribution
    % Used to represent circular densities with Fourier
    % series
    %#ok<*PROP>
    %
    % Florian Pfaff, Gerhard Kurz, Uwe D. Hanebeck,
    % Multimodal Circular Filtering Using Fourier Series
    % Proceedings of the 18th International Conference on Information Fusion (Fusion 2015),
    % Washington D. C., USA, 
    
function f = transformViaFFT(this, desiredTransformation, noOfCoefficients, truncateAtEnd)
            % Calculates transformation of Fourier series via FFT.
            % Expects number of complex coefficients (or sum of number of real
            % coefficients). This is done by calculating the values of the
            % function on the grid (using inverse FFT in pdfOnGrid),
            % applying the transformation, and then using FFT again to
            % obtain the Fourier coefficients. If truncateAtEnd is set to
            % true, more coefficients are calculated if the original
            % density features more. If set to false, entries of the
            % inverse FFT result are discarded.
            if nargin == 2, noOfCoefficients = length(this.a) + length(this.b);end