TransactionsApi.getFilteredEvents mapping /tx/events returns empty results

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Describe the bug
Using the clientApi TransactionsApi.getFilteredEvents the json response has an empty results,

but the request correctly returns limit, offset and events

To Reproduce
Steps to reproduce the behavior:

1. just call TransactionsApi.getFilteredEvents

Expected behavior
The response should have the events in results instead of events

Additional context
This was for this feature hirosystems/explorer#866, but I ended up using the /tx endpoint and using the params event_offset and event_limit for 2 reasons

1. to actually get the events in json which I could not get with the api client
2. the format of the events is more meaningful
   event from /tx endpoint

{
      "event_index": 0,
      "event_type": "fungible_token_asset",
      "tx_id": "0xffe51f5fddceb61b2b2f36e72ce8370a0dbcdfdfc96dd784327fcaf9d2367eac",
      "asset": {
        "asset_event_type": "mint",
        "asset_id": "SP2KAF9RF86PVX3NEE27DFV1CQX0T4WGR41X3S45C.spaghetti::SPAGHETTI",
        "sender": "",
        "recipient": "SPQ2HN9TYF8ZYY9D3G45NGYA9GHA6QZHQ8AXF5QM",
        "amount": "130977757"
      }
    },

from the tx/events endpoint

{
      "event_index": 206,
      "event_type": "smart_contract_log",
      "tx_id": "0xffe51f5fddceb61b2b2f36e72ce8370a0dbcdfdfc96dd784327fcaf9d2367eac",
      "contract_log": {
        "contract_id": "SP1C2K603TGWJGKPT2Z3WWHA0ARM66D352385TTWH.spaghettipunk-staking",
        "topic": "print",
        "value": {
          "hex": "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",
          "repr": "(tuple (action \"stake\") (collection-pool (some (tuple (points-balance u23402777) (stake-time u76499) (total-multiplier u760000)))) (staker (tuple (collections (list 'SP2KAF9RF86PVX3NEE27DFV1CQX0T4WGR41X3S45C.byzantion-bitcoin-bulls 'SP2KAF9RF86PVX3NEE27DFV1CQX0T4WGR41X3S45C.byzantion-bitcoin-bears 'SP2KAF9RF86PVX3NEE27DFV1CQX0T4WGR41X3S45C.bitcoin-whales 'SP1C2K603TGWJGKPT2Z3WWHA0ARM66D352385TTWH.bitcoin-goats 'SP1C2K603TGWJGKPT2Z3WWHA0ARM66D352385TTWH.the-cavalry)) (lifetime-points u29258278068))))"
        }
      }
    },

Note that this issue is not a blocker because this new paginated event feature of the explorer works fine with /tx endpoint
hirosystems/explorer#866