handle doc references to top-level constants

Author: sethladd

lib/src/debug.dart

@@ -0,0 +1,7 @@
+library debugger_helper;
+
+import "dart:developer" as dev;
+
+get debugger =>
+    const String.fromEnvironment('DEBUG') == null ? _nodebugger : dev.debugger;
+_nodebugger({when, message}) {}