Export full class generated for IDL struct instead of each operation? [13723]

[jwillemsen]

When looking at the generated code I see for example in https://github.com/eProsima/Fast-DDS/blob/master/examples/C%2B%2B/Keys/sample.h that each operation is exported separately, why not export the full class using class eProsima_user_DllExport sample, that would make the code generation smaller.