diff --git a/src/launchpad/bar.py b/src/launchpad/bar.py
new file mode 100644
index 00000000..5c0a9a24
--- /dev/null
+++ b/src/launchpad/bar.py
@@ -0,0 +1,19 @@
+class DexMapping:
+  def deobfuscate_method(self, class_name, obfuscated_method_name):
+    clazz = self.lookup_obfuscated_class(class_name)
+    if clazz is None:
+      clazz = self.lookup_deobfuscated_signature(class_name)
+
+    if clazz is None or clazz.methods is None:
+      return None
+
+    return clazz.methods.get(obfuscated_method_name)
+
+  def lookup_obfuscated_class(self, obfuscated_class_name):
+    return self._classes.get(obfuscated_class_name)
+
+  def lookup_deobfuscated_signature(self, deobfuscated_class_signature):
+    for clazz in self._classes.values():
+      if clazz.deobfuscated_signature == deobfuscated_class_signature:
+        return clazz
+    return None
diff --git a/src/launchpad/foo.py b/src/launchpad/foo.py
new file mode 100644
index 00000000..c3ac164f
--- /dev/null
+++ b/src/launchpad/foo.py
@@ -0,0 +1,6 @@
+class DexMapping:
+  def __init__():
+    self._classes_by_deobfuscated = [clazz.deobfuscated_signature for clazz in classes]
+
+  def lookup_deobfuscated_signature(self, deobfuscated_class_signature):
+    return self._classes_by_deobfuscated.get(deobfuscated_class_signature)