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: OperatorPaddingRule.m
    path of file: ./repos/microshift_compression/matlab code/Toolkits/MBeautifier-master/+MBeautifier/+Configuration
    
    the code of the file until where you have to start completion: classdef OperatorPaddingRule

    properties (SetAccess = immutable)
        Key
        ValueFrom
        ValueTo
        Token
        ReplacementPattern
    end

    properties (Access = private)
        MatrixIndexingReplacementPattern
        CellArrayIndexingReplace
    
function obj = OperatorPaddingRule(key, valueFrom, valueTo)
            obj.Key = key;
            obj.ValueFrom = regexptranslate('escape', valueFrom);
            obj.ValueTo = regexptranslate('escape', valueTo);
            obj.Token = ['#MBeautifier_OP_', key, '#'];

            whiteSpaceToken = MBeautifier.Constants.WhiteSpaceToken;
            wsTokenLength = numel(whiteSpaceToken);

            tokenizedReplaceString = strrep(obj.ValueTo, ' ', whiteSpaceToken);
            % Calculate the starting white space count
            leadingWSNum = 0;
            matchCell = regexp(tokenizedReplaceString, ['^(', whiteSpaceToken, ')+'], 'match');
            if numel(matchCell)
                leadingWSNum = numel(matchCell{1}) / wsTokenLength;
            end