You will want to use a "linked" custom transformer, meaning that it will reside in a separate file and not embedded into your workspace. You can password protect the contents of this custom transformer, so that only those with the password can see the contents. You will still be able to run the workspace without the password, however.
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You will want to use a "linked" custom transformer, meaning that it will reside in a separate file and not embedded into your workspace. You can password protect the contents of this custom transformer, so that only those with the password can see the contents. You will still be able to run the workspace without the password, however.