How to have multiple Smart Contracts into a single Chaincode?

Question

I need to split my business logic into two Smart Contracts, A and B, where A adds some data on the ledger and B read's A's data directly from the ledger, for some calculation.

I need this split because:

• A and B will have different endorsement policies
• B's calculation transaction security should rely on "read-set" mechanism for validation, which I know is enforced for data that B reads directly from the ledger but I'm not sure for data read from a cross-chaincode call (and I can't find info about it)

So...

The guide says

Multiple smart contracts can be defined within the same chaincode. When a chaincode is deployed, all smart contracts within it are made available to applications.

But I really can't find a reference on how to bundle multiple Smart Contracts into a single Chaincode (necessary thing in order to let B read A's data).

The best for my project would be having A and B in different languages (respectively, Javascript and Java) but if they need to be written in the same language to fit in the same chaincode I could rewrite the first one.

...

Can somebody help me? I actually just need a reference to explain me how to bundle multiple Smart Contracts into a Chaincode ( or an example, couldn't find that either)