Fix probe3dto2d issue when snirf file has incorrect landmarklabels

        end

        % ----------------------------------------------

        function isValid = isValidLandmarkLabels(obj)

            isValid = 1;

            refpts_labels = {'T7','T8','Oz','Fpz','Cz','C3','C4','Pz','Fz'};

            for u = 1:length(refpts_labels)

                label = refpts_labels{u};

                idx = ismember(obj.landmarkLabels, label);

                if sum(idx) == 0

                    isValid = 0;

                    return

                end

            end 

        end

        % -------------------------------------------------------

        function Project_3D_to_2D(obj) 

            if isempty(obj.sourcePos2D) && isempty(obj.detectorPos2D)

                if isempty(obj.landmarkPos3D)

                if isempty(obj.landmarkPos3D) || ~obj.isValidLandmarkLabels()

                    if ~isempty(obj.sourcePos3D)

                        obj.sourcePos2D = project_3D_to_2D(obj.sourcePos3D);

                    end