fun <S : ContractState> retrieveOutputStateAndRef(clazz: Class<S>, label: String): StateAndRef<S>
Retrieves an output previously defined by TransactionDSLInterpreter.output with a label passed in.
clazz - The class object holding the type of the output state expected.
label - The label of the to-be-retrieved output state.
Return
The output StateAndRef.