This inspection reports when "." is used as a source in @Mapping

//wrong
@Mapper
public interface EmployeeMapper {
    @Mapping(target = "dto", source = ".")
    Employee toEmployee(EmployeeDto employeeDto, @Context CycleAvoidingMappingContext context);
}

//correct
@Mapper
public interface EmployeeMapper {
    @Mapping(source = "employeeDto", target = "dto")
    Employee toEmployee(EmployeeDto employeeDto, @Context CycleAvoidingMappingContext context);
}