src/properties/class-papi-property-sidebar.php
public function get_items() {
		global $wp_registered_sidebars;
		$items = [];

		foreach ( $wp_registered_sidebars as $item ) {
			$items[$item['name']] = $item['id'];
		}

		ksort( $items );

		return $items;
	}
public function get_items() {
		global $wp_registered_sidebars;
		$items = [];

		foreach ( $wp_registered_sidebars as $item ) {
			$items[$item['name']] = $item['id'];
		}

		ksort( $items );

		return $items;
	}
Get registered sidebars as dropdown items.

@return array