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: xASL_imp_BasicParameterChecks.m
    path of file: ./repos/ExploreASL/Functions/Import
    
    the code of the file until where you have to start completion: function x = xASL_imp_BasicParameterChecks(x)
%xASL_imp_BasicParameterChecks Basic parameter checks for the import pipeline
%
% FORMAT: x = xASL_imp_BasicParameterChecks(x)
%
% INPUT:
%   x        - Struct containing pipeline environment parameters, useful when only initializing ExploreASL/debugging

    
function x = xASL_imp_BasicParameterChecks(x)
%xASL_imp_BasicParameterChecks Basic parameter checks for the import pipeline
%
% FORMAT: x = xASL_imp_BasicParameterChecks(x)
%
% INPUT:
%   x        - Struct containing pipeline environment parameters, useful when only initializing ExploreASL/debugging
%
% OUTPUT:
%   x        - Struct containing pipeline environment parameters, useful when only initializing ExploreASL/debugging
%
% -----------------------------------------------------------------------------------------------------------------------------------------------------
% DESCRIPTION:    Basic parameter checks for the import pipeline.
%
%    - check that x.dir.DatasetRoot is correct
%    - determine x.dir.sourceStructure
%    - determine x.dir.studyPar
%    - check x.opts.bImport
%    - set the defaults for ...
%       - x.modules.import.settings.bCopySingleDicoms
%       - x.modules.import.settings.bUseDCMTK
%       - x.modules.import.settings.bCheckPermissions
%
% -----------------------------------------------------------------------------------------------------------------------------------------------------
% EXAMPLE:        n/a
% __________________________________
% Copyright (c) 2015-2022 ExploreASL


    %% Basic checks

    % Fix x.dir.DatasetRoot if the last character is a forward or backward slash
    if strcmp(x.dir.DatasetRoot(end