Missing Doc Change Event Example

Looking over the 2.1 API documentation (https://docs-staging.couchbase.com/couchbase-lite/2.5/swift.html#document-change-events). For Document in C#, in part we have:

• Typed Accessors
• Batch Operations

For Swift we have:

• Typed Accessors
• Batch Operations
• Document change events

The "Document change events" section is missing from C#, Java and Objective-C