Update generated source code

Generated SDK source code using:
- Generator version 3.30.0
- Specification version 1.0.0-dev0.0.35
- Automation (cloudant-sdks) version 583f3f6

Author: cloudant-sdks-automation

README.md

@@ -525,13 +525,30 @@ For sample code on handling errors, see
 ### Raw IO
 
 For endpoints that read or write document content it is possible to bypass
-usage of the built-in models and send or receive a bytes response.
-For examples of using byte streams, see the API reference documentation
-("Example request as a stream" section).
+usage of the built-in models with byte streams. 
+Some endpoints send byte request (input stream), 
+while others receives byte response (output stream).
 
-- [Bulk modify multiple documents in a database](https://cloud.ibm.com/apidocs/cloudant?code=python#postbulkdocs)
-- [Query a list of all documents in a database](https://cloud.ibm.com/apidocs/cloudant?code=python#postalldocs)
-- [Query the database document changes feed](https://cloud.ibm.com/apidocs/cloudant?code=python#postchanges)
+Input stream can be supplied for `BinaryIO` typed
+ property.
+This value will be attached to the existing model based request params. 
+
+Output stream can be gained from functions with suffix `AsStream`. 
+The returned byte stream will allow to consume the response body 
+without triggering the usual JSON unmarshalling that is typically performed by the SDK.
+
+See a usage example for both cases under the note-comments of 
+[update document](#3-update-your-previously-created-document)
+
+For further examples of using byte streams, see the API reference documentation
+("Example request as a stream" collapsed example).
+
+See an example about byte request (input stream):
+- [Bulk modify multiple documents in a database](https://cloud.ibm.com/apidocs/cloudant?code=java#postbulkdocs)
+
+See examples about byte response (output stream):
+- [Query a list of all documents in a database](https://cloud.ibm.com/apidocs/cloudant?code=java#postalldocs)
+- [Query the database document changes feed](https://cloud.ibm.com/apidocs/cloudant?code=java#postchanges)
 
 ### Further resources