2.1.11 [W3C-WEBIDL1] Section 4.6.10.2 keys

V0001: Iterable declarations are not supported

The specification states:

 3.2.7 Iterable declarations
  
 An interface can be declared to be iterable by using an iterable declaration (matching 
 Iterable) in the body of the interface.
  
 4.2.25.1 Creating a sequence from an iterable
  
 4.6.9 Common iterator behavior
  
 4.6.9.1 @@iterator
  
 4.6.9.2 forEach
  
 4.6.10 Iterable declarations
  
 4.6.10.1 entries
  
 4.6.10.2 keys
  
 4.6.10.3 values
  
 4.6.10.4 Default iterator objects
  
 4.6.10.5 Iterator prototype object
  
 4.6.11 Initializing objects from iterables

IE11 Mode, IE10 Mode, IE9 Mode, IE8 Mode, IE7 Mode, and IE5 (Quirks) Mode (All versions)

Iterable declarations are not supported.