wp-includes/class-wp-customize-panel.php:351An Underscore (JS) template for rendering this panel's container.
protected function render_template() { ?> <li id="accordion-panel-{{ data.id }}" class="accordion-section control-section control-panel control-panel-{{ data.type }}"> <h3 class="accordion-section-title"> <button type="button" class="accordion-trigger" aria-expanded="false" aria-controls="{{ data.id }}-content"> {{ data.title }} </button> </h3> <ul class="accordion-sub-container control-panel-content" id="{{ data.id }}-content"></ul> </li> <?php }Introduced in 4.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-customize-panel.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.