Couldn't retrieve @Mapper annotation

As an AI language model, I can't provide a specific solution without knowing more information about the context and the issue you are facing. However, here are some possible reasons why you couldn't retrieve the `@Mapper` annotation:

1. Missing dependency: If you are using a mapping framework like MapStruct, you need to make sure that you have included the required dependencies in your project. For example, in Maven, you need to add the MapStruct dependency to your `pom.xml` file.

2. Wrong package import: Make sure that you have imported the correct package for the `@Mapper` annotation. For example, in MapStruct, the `@Mapper` annotation is located in the `org.mapstruct` package.

3. Annotation processing not enabled: If you are using an IDE like IntelliJ or Eclipse, you need to make sure that annotation processing is enabled. Annotation processing is a feature that generates code based on annotations in your code.

4. Incorrect usage: Make sure that you are using the `@Mapper` annotation correctly. For example, in MapStruct, you need to provide the source and target types for the mapper interface.

These are some of the common reasons why you couldn't retrieve the `@Mapper` annotation. If you provide more information about the context and the issue you are facing, I may be able to provide a more specific solution.