How to use the build.CommandTimer function in build

def cmd_docset_py(options, args):
    cmdTimer = CommandTimer('docset_py')
    if not os.path.isdir('docs/html'):
        msg('ERROR: No docs/html, has the sphinx build command been run?')
        sys.exit(1)

    # clear out any old docset build
    name = 'wxPython-{}'.format(version3)
    docset = posixjoin('dist', '{}.docset'.format(name))
    if os.path.isdir(docset):
        shutil.rmtree(docset)

    # run the docset generator
    VERBOSE = '--verbose' if options.verbose else ''
    runcmd('doc2dash {} --name "{}" --icon {} --destination dist docs/html'
           .format(VERBOSE, name, pyICON))

    # update its Info.plist file

def cmd_doxhtml(options, args):
    cmdTimer = CommandTimer('doxhtml')
    _doDox('html')
    _doDox('chm')

def _doSimpleSetupCmd(options, args, setupCmd):
    cmdTimer = CommandTimer(setupCmd)
    VERBOSE = '--verbose' if options.verbose else ''
    cmd = '"%s" setup.py %s --skip-build  %s %s' % (PYTHON, setupCmd, VERBOSE, options.extra_setup)
    runcmd(cmd)

def cmd_clean_wx(options, args):
    cmdTimer = CommandTimer('clean_wx')
    if isWindows:
        if options.both:
            options.debug = True
        msw = getMSWSettings(options)
        deleteIfExists(opj(msw.dllDir, 'msw'+msw.dll_type))
        delFiles(glob.glob(opj(msw.dllDir, 'wx*%s%s*' % (wxversion2_nodot, msw.dll_type))))
        delFiles(glob.glob(opj(msw.dllDir, 'wx*%s%s*' % (wxversion3_nodot, msw.dll_type))))
        if PYTHON_ARCH == '64bit':
            deleteIfExists(opj(msw.buildDir, 'vc%s_msw%sdll_x64' % (getVisCVersion(), msw.dll_type)))
        else:
            deleteIfExists(opj(msw.buildDir, 'vc%s_msw%sdll' % (getVisCVersion(), msw.dll_type)))

        if options.both:
            options.debug = False
            options.both = False
            cmd_clean_wx(options, args)

def cmd_dox(options, args):
    cmdTimer = CommandTimer('dox')
    _doDox('xml')

def cmd_build_py(options, args):
    cmdTimer = CommandTimer('build_py')
    waf = getWafCmd()
    checkCompiler()

    BUILD_DIR = getBuildDir(options)

    if options.release:
        os.environ['WXPYTHON_RELEASE'] = 'yes'

    if not isWindows:
        WX_CONFIG = posixjoin(BUILD_DIR, 'wx-config')
        if options.use_syswx:
            wxcfg = posixjoin(options.prefix, 'bin', 'wx-config')
            if options.prefix and os.path.exists(wxcfg):
                WX_CONFIG = wxcfg
            else:
                WX_CONFIG = 'wx-config' # hope it is on the PATH

def cmd_bdist_docs(options, args):
    cmdTimer = CommandTimer('bdist_docs')
    pwd = pushDir(phoenixDir())

    cfg = Config()

    msg("Archiving wxPython Phoenix documentation...")
    rootname = "%s-docs-%s" % (baseName, cfg.VERSION)
    tarfilename = "dist/%s.tar.gz" % rootname

    if not os.path.exists('dist'):
        os.makedirs('dist')
    if os.path.exists(tarfilename):
        os.remove(tarfilename)

    with tarfile.open(name=tarfilename, mode="w:gz") as tarball:
        tarball.add('docs/html', os.path.join(rootname, 'docs/html'),
                    filter=lambda info: None if '.svn' in info.name else info)

def cmd_build_pdbzip(options, args):
    if isWindows and options.relwithdebug:
        cmdTimer = CommandTimer('build_pdbzip')

        if not os.path.exists('dist'):
            os.mkdir('dist')

        cfg = Config()
        filenames = glob.glob('./wx/*.pdb')
        if not filenames:
            msg('No PDB files found in ./wx!')
            return
        arch = 'win_amd64' if PYTHON_ARCH == '64bit' else 'win32'
        pyver = 'py{}'.format(PYSHORTVER)
        zipname = 'dist/{}-pdb-{}-{}-{}.zip'.format(baseName, cfg.VERSION, pyver, arch)
        from zipfile import ZipFile, ZIP_DEFLATED
        with ZipFile(zipname, 'w', ZIP_DEFLATED) as zip:
            for name in filenames:
                zip.write(name)

def cmd_etg(options, args):
    cmdTimer = CommandTimer('etg')
    cfg = Config()
    assert os.path.exists(cfg.DOXY_XML_DIR), "Doxygen XML folder not found: " + cfg.DOXY_XML_DIR

    pwd = pushDir(cfg.ROOT_DIR)

    # TODO: Better support for selecting etg cmd-line flags...
    flags = '--sip'
    if options.nodoc:
        flags += ' --nodoc'

    # get the files to run, moving _core the to the front of the list
    etgfiles = glob.glob(opj('etg', '_*.py'))
    core_file = opj('etg', '_core.py')
    if core_file in etgfiles:
        etgfiles.remove(core_file)
        etgfiles.insert(0, core_file)