Handling multiple roots

[hfaghihi15]

This issue is opened to resolve the paradigm of handling multiple roots of the same type in case that the root doesn't exist in the data structure.

The solution has been proposed to add two additional functionalities to the data node to check whether the root is unique and to create a dummy root.

@auszok Could you please provide those functions here?

[auszok]

DataNodeBuilder new methods:

def needsBatchRootDN(self):
def addBatchRootDN(self):

[hfaghihi15]

• Make an example for the multi-root --> @auszok Do you have an example right now?
• Checking all programs for the usage of getDatanode()
• Update all programs with the mentioned functionality in this issue
• Execute and sanity check the programs

[hfaghihi15]

@auszok Could you please check the last todo list for this support and mark the one that is done, also if this feature is now supported please point to the documentation and close it.