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: OrdMlWU.m
    path of file: ./repos/BRAPH-2/braph2/graphs
    
    the code of the file until where you have to start completion: classdef OrdMlWU < Graph
	%OrdMlWU is an ordinal multilayer weighted undirected graph.
	% It is a subclass of <a href="matlab:help Graph">Graph</a>.
	%
	% In an ordinal multilayer weighted undirected (WU) graph, layers could have different number 
	%  of nodes with within-lay
    
function check_out = existsProp(prop)
			%EXISTSPROP checks whether property exists in ordinal multilayer weighted undirected graph/error.
			%
			% CHECK = OrdMlWU.EXISTSPROP(PROP) checks whether the property PROP exists.
			%
			% Alternative forms to call this method are:
			%  CHECK = G.EXISTSPROP(PROP) checks whether PROP exists for G.
			%  CHECK = Element.EXISTSPROP(G, PROP) checks whether PROP exists for G.
			%  CHECK = Element.EXISTSPROP(OrdMlWU, PROP) checks whether PROP exists for OrdMlWU.
			%
			% Element.EXISTSPROP(PROP) throws an error if the PROP does NOT exist.
			%  Error id: [BRAPH2:OrdMlWU:WrongInput]
			%
			% Alternative forms to call this method are:
			%  G.EXISTSPROP(PROP) throws error if PROP does NOT exist for G.
			%   Error id: [BRAPH2:OrdMlWU:WrongInput]
			%  Element.EXISTSPROP(G, PROP) throws error if PROP does NOT exist for G.
			%   Error id: [BRAPH2:OrdMlWU:WrongInput]
			%  Element.EXISTSPROP(OrdMlWU, PROP) throws error if PROP does NOT exist for OrdMlWU.
			%   Error id: [BRAPH2:OrdMlWU:WrongInput]
			%
			% Note that the Element.EXISTSPROP(G) and Element.EXISTSPROP('OrdMlWU')
			%  are less computationally efficient.
			%
			% See also getProps, existsTag.
			
			check = prop >= 1 && prop <= 42 && round(prop) == prop; %CET: Computational Efficiency Trick
			
			if nargout == 1
				check_out = check;
			elseif ~check
				error( ...
					['BRAPH2' ':OrdMlWU:' 'WrongInput'], ...
					['BRAPH2' ':OrdMlWU:' 'WrongInput' '\n' ...
					'The value ' tostring(prop, 100, ' ...') ' is not a valid prop for OrdMlWU.'] ...
					)
			end