<?php 
$wp_customize->add_section( new Bansta_Button_Section( $wp_customize, 'bansta_upgrade_pro', [
    'title' => esc_html__('Bansta Pro ', 'bansta'),
    'type' => 'button',
    'pro_text' => esc_html__('Upgrade to Pro', 'bansta'),
    'pro_url' => esc_url('https://tsteki.com/bansta-wordpress-theme/'),
    'priority' => 1
] )	);