--- /dev/null
+<?php
+namespace Consolidation\AnnotatedCommand\Hooks;
+
+/**
+ * Extract Output hooks are used to select the particular
+ * data elements of the result that should be printed as
+ * the command output -- perhaps after being formatted.
+ *
+ * @see HookManager::addOutputExtractor()
+ */
+interface ExtractOutputInterface
+{
+ public function extractOutput($result);
+}