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: SubjectCON_FUN_MP.m
    path of file: ./repos/BRAPH-2/braph2/pipelines/connectivity-functional multiplex
    
    the code of the file until where you have to start completion: classdef SubjectCON_FUN_MP < Subject
	%SubjectCON_FUN_MP is a subject with connectivity and functional multiplex data (e.
	% It is a subclass of <a href="matlab:help Subject">Subject</a>.
	%
	% Subject with connectivity and functional data (e.g. obtained from DTI and fMRI).
	% The first layer contains a connectivity matrix and the second layer contains functional data.
	%
	% The list of SubjectCON_FUN_MP properties is:
	%  <stro
    
function prop_number = getPropNumber(varargin)
			%GETPROPNUMBER returns the property number of subject with connectivity and functional multiplex data.
			%
			% N = SubjectCON_FUN_MP.GETPROPNUMBER() returns the property number of subject with connectivity and functional multiplex data.
			%
			% N = SubjectCON_FUN_MP.GETPROPNUMBER(CATEGORY) returns the property number of subject with connectivity and functional multiplex data
			%  of category CATEGORY
			%
			% Alternative forms to call this method are:
			%  N = SUB.GETPROPNUMBER([CATEGORY]) returns the property number of the subject with connectivity and functional multiplex data SUB.
			%  N = Element.GETPROPNUMBER(SUB) returns the property number of 'SUB'.
			%  N = Element.GETPROPNUMBER('SubjectCON_FUN_MP') returns the property number of 'SubjectCON_FUN_MP'.
			%
			% Note that the Element.GETPROPNUMBER(SUB) and Element.GETPROPNUMBER('SubjectCON_FUN_MP')
			%  are less computationally efficient.
			%
			% See also getProps, Category.
			
			%CET: Computational Efficiency Trick
			
			if nargin == 0
				prop_number = 12;
				return
			end