Astra_Addon_Customizer::sanitize_responsive_background( array $bg_obj )

		public static function sanitize_responsive_background( $bg_obj ) {
			if ( is_callable( 'Astra_Customizer_Sanitizes::sanitize_responsive_background' ) ) {
				return Astra_Customizer_Sanitizes::sanitize_responsive_background( $bg_obj );
			}

			// Default Responsive Background Image.
			$defaults = array(
				'desktop' => array(
					'background-color'      => '',
					'background-image'      => '',
					'background-repeat'     => 'repeat',
					'background-position'   => 'center center',
					'background-size'       => 'auto',
					'background-attachment' => 'scroll',
				),
				'tablet'  => array(
					'background-color'      => '',
					'background-image'      => '',
					'background-repeat'     => 'repeat',
					'background-position'   => 'center center',
					'background-size'       => 'auto',
					'background-attachment' => 'scroll',
				),
				'mobile'  => array(
					'background-color'      => '',
					'background-image'      => '',
					'background-repeat'     => 'repeat',
					'background-position'   => 'center center',
					'background-size'       => 'auto',
					'background-attachment' => 'scroll',
				),
			);

			// Merge responsive background object and default object into $out_bg_obj array.
			$out_bg_obj = wp_parse_args( $bg_obj, $defaults );

			foreach ( $out_bg_obj as $device => $bg ) {
				foreach ( $bg as $key => $value ) {
					if ( 'background-image' === $key ) {
						$out_bg_obj[ $device ] [ $key ] = esc_url_raw( $value );
					} else {
						$out_bg_obj[ $device ] [ $key ] = esc_attr( $value );
					}
				}
			}
			return $out_bg_obj;
		}