[input-output-hk/cardano-sl] [CO-347] Wallet’s UTXO histogram view (#3402)

paweljakubas commented on this pull request.

> + ]
+
+instance Arbitrary TxIn where
+ arbitrary = oneof
+ [ TxInUtxo <$> arbitrary <*> arbitrary
+ , TxInUnknown <$> choose (1, 255) <*> scale (min 150) arbitrary
+ ]
+ shrink = genericShrink
+
+instance Arbitrary TxOutAux where
+ arbitrary = genericArbitrary
+ shrink = genericShrink
+
+instance Arbitrary TxOut where
+ arbitrary = genericArbitrary
+ shrink = genericShrink

it is unfortunately needed to support Utxo