--- /dev/null
+<?php
+namespace Consolidation\OutputFormatters\StructuredData;
+
+use Consolidation\OutputFormatters\Options\FormatterOptions;
+
+interface ListDataInterface
+{
+ /**
+ * Convert data to a format suitable for use in a list.
+ * By default, the array values will be used. Implement
+ * ListDataInterface to use some other criteria (e.g. array keys).
+ *
+ * @return array
+ */
+ public function getListData(FormatterOptions $options);
+}