add_action( \'customize_register\', \'boilerplate_customize_register\' );
function boilerplate_customize_register($wp_customize) {
    $wp_customize->add_section( \'themename_color_scheme\', array(
        \'title\'          => __( \'Color Scheme (sect!on name)\', \'themename\' ),
        \'description\'    => "This changes color scheme",
        \'priority\'       => 135,
    ));
    $wp_customize->add_setting(\'themename_theme_options[image_upload_test]\', array(
        \'default\' => \'image.jpg\',
        \'capability\' => \'edit_theme_options\',
        \'type\' => \'option\',
    ));
    $wp_customize->add_control( new WP_Customize_Image_Control($wp_customize, \'image_upload_test\', array(
        \'label\' => __(\'Image Upload Test\', \'themename\'),
        \'section\' => \'themename_color_scheme\',
        \'settings\' => \'themename_theme_options[image_upload_test]\',
    )));
}

这将在主题自定义页面中添加一个部分，并在其中添加一个图像上载对话框。这张图片去哪里了？我该如何参考它？