When using the objcCompatible option for swift5, this will add @objcMembers instead of @objc at the generated class level for Models and APIs so that all properties and functions will be visible by Objective-C. I had suggested this in issue 13175 as an enhancement.
I've re-generated the samples, which now reflect this change, and there are no changes to docs.

Attn: @jgavris @ehyche @Edubits @jaz-ah @4brunu

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package 
  ./bin/generate-samples.sh
  ./bin/utils/export_docs_generators.sh
  

  Commit all changed files.
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  ./bin/utils/ensure-up-to-date.sh
  

  Commit all changed files.
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