diff --git a/Userland/DevTools/HackStudio/HackStudio.h b/Userland/DevTools/HackStudio/HackStudio.h
index c8ad04170f..962c9d3b69 100644
--- a/Userland/DevTools/HackStudio/HackStudio.h
+++ b/Userland/DevTools/HackStudio/HackStudio.h
@@ -21,6 +21,7 @@ void open_file(const String&, size_t line, size_t column);
 Project& project();
 String currently_open_file();
 void set_current_editor_wrapper(RefPtr<EditorWrapper>);
+void for_each_open_file(Function<void(ProjectFile const&)>);
 
 class Locator;
 Locator& locator();
diff --git a/Userland/DevTools/HackStudio/HackStudioWidget.cpp b/Userland/DevTools/HackStudio/HackStudioWidget.cpp
index 1e47b20aba..7bf0509c1f 100644
--- a/Userland/DevTools/HackStudio/HackStudioWidget.cpp
+++ b/Userland/DevTools/HackStudio/HackStudioWidget.cpp
@@ -1484,4 +1484,11 @@ void HackStudioWidget::open_coredump(String const& coredump_path)
     }
 }
 
+void HackStudioWidget::for_each_open_file(Function<void(ProjectFile const&)> func)
+{
+    for (auto& open_file : m_open_files) {
+        func(*open_file.value);
+    }
+}
+
 }
diff --git a/Userland/DevTools/HackStudio/HackStudioWidget.h b/Userland/DevTools/HackStudio/HackStudioWidget.h
index 1e6342d486..7a9ea47fe0 100644
--- a/Userland/DevTools/HackStudio/HackStudioWidget.h
+++ b/Userland/DevTools/HackStudio/HackStudioWidget.h
@@ -69,6 +69,7 @@ public:
     };
 
     void open_coredump(String const& coredump_path);
+    void for_each_open_file(Function<void(ProjectFile const&)>);
 
 private:
     static String get_full_path_of_serenity_source(const String& file);
diff --git a/Userland/DevTools/HackStudio/main.cpp b/Userland/DevTools/HackStudio/main.cpp
index a0c4650dc8..4ead5ec113 100644
--- a/Userland/DevTools/HackStudio/main.cpp
+++ b/Userland/DevTools/HackStudio/main.cpp
@@ -168,4 +168,9 @@ Locator& locator()
     return s_hack_studio_widget->locator();
 }
 
+void for_each_open_file(Function<void(ProjectFile const&)> func)
+{
+    s_hack_studio_widget->for_each_open_file(move(func));
+}
+
 }