soderlind/plugin-customizer

<?php
namespace PluginCustomizer;
if ( ! interface_exists( 'PluginCustomizer\Plugin_Customizer_Interface' ) ) {
    interface Plugin_Customizer_Interface {
        public function plugin_customizer_add_templates();
        public function plugin_customizer_previewer_postmessage_script();
        public function customizer_plugin_sections( $wp_customize );
        public function customizer_plugin_settings( $wp_customize );
        public function customizer_plugin_controls( $wp_customize );
    }
}