Update generated source code

Generated SDK source code using:
- Generator version 3.30.0
- Specification version 1.0.0-dev0.0.36
- Automation (cloudant-sdks) version ac0abb5

Author: cloudant-sdks-automation

README.md

@@ -525,13 +525,33 @@ 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. 
 
-- [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)
+Depending on the specific SDK operation it may be possible to:
+* accept a user-provided byte stream to send to the server as a request body
+* return a byte stream of the server response body to the user
+* use byte streams for both the request and response bodies
+
+Request byte stream can be supplied for arguments that accept the `BinaryIO` type.
+The model objects support passing this byte stream value to the request body.
+
+Response byte stream is supported in functions with the suffix of `AsStream`.
+The returned byte stream allows the response body to be consumed
+without triggering JSON unmarshalling that is typically performed by the SDK.
+
+The [update document](#3-update-your-previously-created-document) section
+contains examples for both request and response byte stream cases.
+
+The API reference contains further examples of using byte streams. 
+They are titled "Example request as stream" and are initially collapsed. 
+Expand them to see examples of:
+
+- Byte requests:
+  - [Bulk modify multiple documents in a database](https://cloud.ibm.com/apidocs/cloudant?code=python#postbulkdocs)
+
+- Byte responses:
+  - [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)
 
 ### Further resources