How to disable Tab key to select the suggestions in Code Completion?

Currently, both Tab and Return keys can select the suggestions in the Code Completion popup. I want the Return key to be the only triggered shortcut to select the suggestions. Because I want to use the Tab key to navigate to the next code placeholder.

As you can in the screenshot after I typed genre, I want to move on to the code placeholder using Tab. But if I used Tab or Return key, Xcode will select the suggestion.

How to disable Tab key to select the suggestions in Code Completion?
 
 
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