contentRightsDeclarations top-level constant
The two answers Apple accepts for "does this app contain, show or access third-party content".
It is an attribute of the app rather than of a version, it starts null, and a null one makes the version unreviewable — with an error that says only "this resource cannot be reviewed", which is how it costs an afternoon.
Implementation
const contentRightsDeclarations = {
'DOES_NOT_USE_THIRD_PARTY_CONTENT',
'USES_THIRD_PARTY_CONTENT',
};