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: document_cache.m
    path of file: ./repos/toolkit-legacy/report
    
    the code of the file until where you have to start completion: function result = document_cache(context, identifier, fun, varargin)
% document_cache Cache proxy for report generation
%
% Can be used with report context to cache results of a certain function.
%
% Input:
% - context (structure): Report context structure.
% - identifier (string): Caching identifier.

    
function result = document_cache(context, identifier, fun, varargin)
% document_cache Cache proxy for report generation
%
% Can be used with report context to cache results of a certain function.
%
% Input:
% - context (structure): Report context structure.
% - identifier (string): Caching identifier.
% - fun (handle): Handle to processing function.
% - varargin (cell): Arguments for processing function.
%
% Output:
% - result: Output argument of the processing function.
%
cache_file = fullfile(context.cachedir, sprintf('%s.mat', identifier));

result = {};
if exist(cache_file, 'file')
    load(cache_file);
end