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: PanelPropMarker.m
    path of file: ./repos/BRAPH-2/braph2/src/gui
    
    the code of the file until where you have to start completion: classdef PanelPropMarker < PanelProp
	%PanelPropMarker plots the panel of a property marker.
	% It is a subclass of <a href="matlab:help PanelProp">PanelProp</a>.
	%
	% A Marker Prop Panel (PanelPropMarker) plots the panel for a MARKER property with a dro
    
function subclass_list = getSubclasses()
			%GETSUBCLASSES returns all subclasses of the marker prop panel.
			%
			% LIST = PanelPropMarker.GETSUBCLASSES() returns all subclasses of 'PanelPropMarker'.
			%
			% Alternative forms to call this method are:
			%  LIST = PR.GETSUBCLASSES() returns all subclasses of the marker prop panel PR.
			%  LIST = Element.GETSUBCLASSES(PR) returns all subclasses of 'PR'.
			%  LIST = Element.GETSUBCLASSES('PanelPropMarker') returns all subclasses of 'PanelPropMarker'.
			%
			% Note that the Element.GETSUBCLASSES(PR) and Element.GETSUBCLASSES('PanelPropMarker')
			%  are less computationally efficient.
			%
			% See also subclasses.
			
			subclass_list = { 'PanelPropMarker' }; %CET: Computational Efficiency Trick
		end