Default Top Level Panel Sections in WordPress Customizer

panels.php

<?php
//Extracted Default Panel Sections from /wp-includes/class-wp-customize-manager.php

$this->add_section( new WP_Customize_Themes_Section( $this, 'themes', array(
  'title'      => $this->theme()->display( 'Name' ),
  'capability' => 'switch_themes',
  'priority'   => 0,
) ) );


$this->add_section( 'title_tagline', array(
  'title'    => __( 'Site Identity' ),
  'priority' => 20,
) );


$this->add_section( 'colors', array(
  'title'          => __( 'Colors' ),
  'priority'       => 40,
) );


$this->add_section( 'header_image', array(
  'title'          => __( 'Header Image' ),
  'theme_supports' => 'custom-header',
  'priority'       => 60,
) );


$this->add_section( 'background_image', array(
  'title'          => __( 'Background Image' ),
  'theme_supports' => 'custom-background',
  'priority'       => 80,
) );


// Replicate behavior from options-reading.php and hide front page options if there are no pages
if ( get_pages() ) {
  $this->add_section( 'static_front_page', array(
    'title'          => __( 'Static Front Page' ),
  //	'theme_supports' => 'static-front-page',
    'priority'       => 120,
    'description'    => __( 'Your theme supports a static front page.' ),
  ) );