Firestore: Add 'Transaction.get' / 'Transaction.get_all'.#8628

Merged

tseaver merged 4 commits intogoogleapis:masterfrom HemangChothani:feature/refactor-transaction-layer

Jul 15, 2019

+69-1

Commits on Jul 10, 2019

Commits on Jul 12, 2019

update test cases as per recomonded
HemangChothani
committed