customize_render_section_{$this->id} WordPress Action Hook

The customize_render_section_{$this->id} hook is used to render a Customizer section. This hook is fired when the Customizer is rendering a given section. The dynamic portion of the hook name, $this->id, refers to the section ID. This hook allows you to add your own content to a Customizer section. You can use this hook to display a description of the section, or any other content that you want to add.

do_action( "customize_render_section_{$this->id}" ) #