Getting Add Setting Error message while adding the control in customizer.

Hi,
Recently I tried creating a theme using a wordpress customizer feature. Everything has worked all fine. Yesterday i thought of checking the theme via ‘theme check’ plugin and found out i had following error message.

Found a Customizer setting that did not have a sanitization callback function. Every call to the add_setting() method needs to have a sanitization callback function passed.

Rather than using the straight forward process of adding the controls and settings, I added them using array and loops (Following code might clarify what I am talking about.) Has this process got something to do with the error message I am receiving. I have added the sanitization function and it’s functioning too. Although I don’t get why the sanitization error is being displayed. I would appreciate any kind of help you can provide on this matter.

<?php
/**
 * Mytheme Theme Customizer
 *
 * @package Mytheme
 */

/**
 * Add postMessage support for site title and description for the Theme Customizer.
 *
 * @param WP_Customize_Manager $wp_customize Theme Customizer object.
 */
function mytheme_customize_register( $wp_customize ) {
	$wp_customize->get_setting( 'blogname' )->transport         = 'postMessage';
	$wp_customize->get_setting( 'blogdescription' )->transport  = 'postMessage';
	$wp_customize->get_setting( 'header_textcolor' )->transport = 'postMessage';

	$controls = array(
		'top_section_bg_color' => array(
		'id' => 'top_section_bg_color',
		'args' => array(
	            'label' => __('Top Section Color', 'mytheme'),
	            'section' => 'general_section',
	            'type' => 'text',
	            'priority' => 1
	   		)
		)
	);

	$settings = array(
		'top_section_bg_color' => array(
		'id'=> 'top_section_bg_color',
		'args' => array(
			'default' => '#FFFFFF',
            'sanitize_callback' => 'mytheme_sanitize_text'
		)
		)
	);

	$sections = array(
		'general_section' => array(
			'id' => 'general_section',
			'args' => array(
				'title' => __('General Settings', 'mytheme'),
		        'description' => __('General Setting Configurations', 'mytheme'),
		        'priority' => 1,
		        'capability' => 'edit_theme_options',
		        'theme_supports' => '',
	        )
        )
	);

	foreach($settings as $setting) :
        $wp_customize->add_setting($setting['id'],$setting['args']);
    endforeach;

	foreach($sections as $section) :
    	$wp_customize->add_section($section['id'], $section['args']);
	endforeach;

	foreach($controls as $control) :
            $wp_customize->add_control($control['id'], $control['args']);
    endforeach;

	function mytheme_sanitize_text($input) {
		return esc_attr($input);
	}
}
add_action( 'customize_register', 'mytheme_customize_register' );

/**
 * Binds JS handlers to make Theme Customizer preview reload changes asynchronously.
 */
function mytheme_customize_preview_js() {
	wp_enqueue_script( 'mytheme_customizer', get_template_directory_uri() . '/js/customizer.js', array( 'customize-preview' ), '20130508', true );
}
add_action( 'customize_preview_init', 'mytheme_customize_preview_js' );

Thanks,