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When a new field collection is created and attached to its host, it cannot be accessed via a EntityListWrapper until it have been saved.
This change coupled withallows for the EntityListWrapper to access a list with both ids and entities making it much easier to manage field collections before they are saved.
Also when you have multiple new field collections there is a bug in which the field language is returned as 0 unstead of (normally) und. This is fixed in.