Don't see how to "GetData()" on the Managed Data of an Account

[MikeFair]

I don't see how to retrieve the values from the Managed Data section of an Account object.

After executing the SetData(key_string, value_bytes) operation on an Account (which succeeds) I expected to see something like Account.GetData(key_string) or Account.ManagedData[key_string] on the object that comes back from Client.LoadAccount(account_id).

The Horizon server includes the values in the data field on the Account's JSON response object.
You can see an example on Account GCORTO4MOGRSOZOVYELTL5SDTZCGLE2YA7YDYV7X5EMDTHARSMEAOZJQ in the Test Network here:
https://www.stellar.org/laboratory/#explorer?resource=accounts&endpoint=single&values=eyJhY2NvdW50X2lkIjoiR0NPUlRPNE1PR1JTT1pPVllFTFRMNVNEVFpDR0xFMllBN1lEWVY3WDVFTURUSEFSU01FQU9aSlEifQ%3D%3D&network=test

Here's a trimmed version of the full response:

{
  "_links": {
 ...
  },
  "id": "GCORTO4MOGRSOZOVYELTL5SDTZCGLE2YA7YDYV7X5EMDTHARSMEAOZJQ",
  "paging_token": "",
  "account_id": "GCORTO4MOGRSOZOVYELTL5SDTZCGLE2YA7YDYV7X5EMDTHARSMEAOZJQ",
  "sequence": "993559079550998",
  "subentry_count": 5,
  "thresholds": {
    "low_threshold": 0,
    "med_threshold": 0,
    "high_threshold": 0
  },
  "flags": {
    "auth_required": false,
    "auth_revocable": false
  },
  "balances": [
...
  ],
  "signers": [
...
  ],
  "data": {
    "..": "R0NCVkwzU1FGRVZLUkxQNkFKNDdVS0tXWUVCWTQ1V0hBSkhDRVpLVldNVEdNQ1Q0SDROS1FZTEg=",
    "SecondString": "R0NCVkwzU1FGRVZLUkxQNkFKNDdVS0tXWUVCWTQ1V0hBSkhDRVpLVldNVEdNQ1Q0SDROS1FZTEg="
  }
}

I also looked at the JavaScript SDK to see if I could figure out the expected pattern but data retrieval Operations seems to be missing from there as well (but perhaps the JSON response object loads more natively in that SDK).