Fix object docbloc for services

[gmazzap]

• Please check if the PR fulfills these requirements

• [x] The commit message follows our guidelines

• [ ] Tests for the changes have been added (for bug fixes/features)

• [ ] Docs have been added/updated (for bug fixes/features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Docbloc fix.

• What is the current behavior? (You can also link to an open issue here)

In some places services are still references as object, even if now the correct type is mixed.

• What is the new behavior (if this is a feature change)?

Always reference services as mixed in doc bloc,

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

No.

• Other information:

Sorry for yet another PR.

Note no code change, just doc bloc.