curl -i -X GET "https://api.box.com/2.0/files/12345/versions/456456" \
     -H "authorization: Bearer <ACCESS_TOKEN>"

client.file_versions.get_file_version_by_id(file.id, file_versions.entries[0].id)

await client.fileVersions.getFileVersionById(
  file.id,
  fileVersions.entries![0].id,
);

try await client.fileVersions.getFileVersionById(fileId: file.id, fileVersionId: fileVersions.entries![0].id)

client.getFileVersions().getFileVersionById(file.getId(), fileVersions.getEntries().get(0).getId())

await client.FileVersions.GetFileVersionByIdAsync(fileId: file.Id, fileVersionId: NullableUtils.Unwrap(fileVersions.Entries)[0].Id);

{
  "id": "12345",
  "type": "file_version",
  "sha1": "134b65991ed521fcfe4724b7d814ab8ded5185dc",
  "name": "tigers.jpeg",
  "size": 629644,
  "created_at": "2012-12-12T10:53:43-08:00",
  "modified_at": "2012-12-12T10:53:43-08:00",
  "modified_by": {
    "id": "11446498",
    "type": "user",
    "name": "Aaron Levie",
    "login": "ceo@example.com"
  },
  "trashed_at": "2012-12-12T10:53:43-08:00",
  "trashed_by": {
    "id": "11446498",
    "type": "user",
    "name": "Aaron Levie",
    "login": "ceo@example.com"
  },
  "restored_at": "2012-12-12T10:53:43-08:00",
  "restored_by": {
    "id": "11446498",
    "type": "user",
    "name": "Aaron Levie",
    "login": "ceo@example.com"
  },
  "purged_at": "2012-12-12T10:53:43-08:00",
  "uploader_display_name": "Ellis Wiggins",
  "version_number": "1"
}

{
  "type": "error",
  "status": 400,
  "code": "item_name_invalid",
  "message": "Method Not Allowed",
  "context_info": {
    "message": "Something went wrong"
  },
  "help_url": "https://developer.box.com/guides/api-calls/permissions-and-errors/common-errors/",
  "request_id": "abcdef123456"
}