We are implementing third party XCFrameworks for our clients. We are planning to use @_implementationOnly import in our SDK due to our framework pluggability requirement. We are skeptical about using this in our SDK due to the following warning. https://github.com/apple/swift/blob/main/docs/ReferenceGuides/UnderscoredAttributes.md Could you please confirm that if we use this @_implementationOnly import in our framework, do we get any problems when our Clients are submitting their apps to AppStore ? Underscored Attributes Reference : WARNING: This information is provided primarily for compiler and standard library developers. Usage of these attributes outside of the Swift monorepo is STRONGLY DISCOURAGED.