Couldn't retrieve @Mapper annotation

As an AI language model, I cannot determine which programming language you are referring to. However, in general, the "@Mapper" annotation is used in object mapping frameworks like MapStruct in Java.

If you are unable to retrieve the "@Mapper" annotation, it could be due to the following reasons:

1. Missing dependency: You need to ensure that you have the necessary MapStruct dependency in your project. Check your project configuration files and ensure that you have added the MapStruct dependency.

2. Incorrect import: Ensure that you have imported the "@Mapper" annotation from the correct package. In Java, the correct import for the "@Mapper" annotation is "org.mapstruct.Mapper."

3. Annotation processing: Ensure that your IDE is set up to process annotations correctly. In IntelliJ IDEA, you can check this by going to "Settings" -> "Build, Execution, Deployment" -> "Compiler" -> "Annotation Processors" and ensuring that "Enable annotation processing" is checked.

4. Incompatible version: Ensure that you have the correct version of MapStruct in your project. If you are using an older version of MapStruct, it might not have the "@Mapper" annotation. Check the MapStruct documentation for the correct version to use.

If none of these solutions work, you can seek help from MapStruct support or the community.