Source

File: wp-includes/customize/class-wp-customize-themes-section.php

*/
	public $action = '';

	/**
	 * Theme section filter type.
	 *
	 * Determines whether filters are applied to loaded (local) themes or by initiating a new remote query (remote).
	 * When filtering is local, the initial themes query is not paginated by default.
	 *
	 * @since 4.9.0
	 * @var string
	 */
	public $filter_type = 'local';

	/**
	 * Get section parameters for JS.
	 *
	 * @since 4.9.0
	 * @return array Exported parameters.
	 */
	public function json() {
		$exported                = parent::json();
		$exported['action']      = $this->action;
		$exported['filter_type'] = $this->filter_type;

		return $exported;
	}

	/**
	 * Render a themes section as a JS template.
	 *
	 * The template is only rendered by PHP once, so all actions are prepared at once on the server side.
	 *
	 * @since 4.9.0
	 */
	protected function render_template() {
		?>
		<li id="accordion-section-{{ data.id }}" class="theme-section">
			<button type="button" class="customize-themes-section-title themes-section-{{ data.id }}">{{ data.title }}</button>
			<?php if ( current_user_can( 'install_themes' ) || is_multisite() ) : // @todo Upload support. ?>
			<?php endif; ?>
			<div class="customize-themes-section themes-section-{{ data.id }} control-section-content themes-php">
				<div class="theme-overlay" tabindex="0" role="dialog" aria-label="<?php esc_attr_e( 'Theme Details' ); ?>"></div>
				<div class="theme-browser rendered">
					<div class="customize-preview-header themes-filter-bar">
						<?php $this->filter_bar_content_template(); ?>
					</div>
					<?php $this->filter_drawer_content_template(); ?>
					<div class="error unexpected-error" style="display: none; ">
						<p>