Specs: Provide a debug-mode-only API to expose the Module objects imported by a Module, for use by …

sky/specs/apis.md

 APIs
 ====
 
 The Sky core API
 ----------------
 
 ```javascript
 module 'sky:core' {
 
   // EVENTS
@@ skipping 265 matching lines @@
     constructor (Dictionary<String> attributes); // shorthand
     constructor (); // shorthand
 
     constructor attribute String tagName;
     constructor attribute Boolean shadow;
   }
 
   abstract class AbstractModule : EventTarget {
     readonly attribute Document document; // O(1) // the Documentof the module or application
     Promise<any> import(String url); // O(Yikes) // returns the module's exports
+    private Array<Module> getImports(); O(N) // returns the Module objects of all the imported modules
 
     readonly attribute String url;
 
     ElementConstructor registerElement(ElementRegistration options); // O(1)
     // if you call registerElement() with an object that was created by
     // registerElement(), it just returns the object after registering it,
     // rather than creating a new constructor
     // otherwise, it proceeds as follows:
     //  1. let constructor be the constructor passed in, if any
     //  2. let prototype be the constructor's prototype; if there is no
@@ skipping 198 matching lines @@
   the core mojo fabric JS API   sky:mojo:fabric:core
   the asyncWait/cancelWait mojo fabric JS API (interface to IPC thread)  sky:mojo:fabric:ipc
   the mojom for the shell, proxying through C++ so that the shell pipe isn't exposed  sky:mojo:shell
   the sky API  sky:core
   the sky debug symbols for private APIs  sky:debug
 ```
 
 TODO(ianh): determine if we want to separate the "this" from the
 Document, especially for Modules, so that exposing a module's element
 doesn't expose the module's exports attribute.