uploadData method
Upload data for a custom data source.
Request parameters:
accountId - Account Id associated with the upload.
Value must have pattern \d+.
webPropertyId - Web property UA-string associated with the upload.
Value must have pattern UA-\d+-\d+.
customDataSourceId - Custom data source Id to which the data being
uploaded belongs.
$fields - Selector specifying which fields to include in a partial
response.
uploadMedia - The media to upload.
uploadOptions - Options for the media upload. Streaming Media without
the length being known ahead of time is only supported via resumable
uploads.
Completes with a Upload.
Completes with a commons.ApiRequestError if the API endpoint returned an error.
If the used http.Client completes with an error when making a REST call,
this method will complete with the same error.
Implementation
async.Future<Upload> uploadData(
  core.String accountId,
  core.String webPropertyId,
  core.String customDataSourceId, {
  core.String? $fields,
  commons.UploadOptions uploadOptions = commons.UploadOptions.defaultOptions,
  commons.Media? uploadMedia,
}) async {
  final queryParams_ = <core.String, core.List<core.String>>{
    if ($fields != null) 'fields': [$fields],
  };
  core.String url_;
  if (uploadMedia == null) {
    url_ =
        'management/accounts/' +
        commons.escapeVariable('$accountId') +
        '/webproperties/' +
        commons.escapeVariable('$webPropertyId') +
        '/customDataSources/' +
        commons.escapeVariable('$customDataSourceId') +
        '/uploads';
  } else if (uploadOptions is commons.ResumableUploadOptions) {
    url_ =
        '/resumable/upload/analytics/v3/management/accounts/' +
        commons.escapeVariable('$accountId') +
        '/webproperties/' +
        commons.escapeVariable('$webPropertyId') +
        '/customDataSources/' +
        commons.escapeVariable('$customDataSourceId') +
        '/uploads';
  } else {
    url_ =
        '/upload/analytics/v3/management/accounts/' +
        commons.escapeVariable('$accountId') +
        '/webproperties/' +
        commons.escapeVariable('$webPropertyId') +
        '/customDataSources/' +
        commons.escapeVariable('$customDataSourceId') +
        '/uploads';
  }
  final response_ = await _requester.request(
    url_,
    'POST',
    queryParams: queryParams_,
    uploadMedia: uploadMedia,
    uploadOptions: uploadOptions,
  );
  return Upload.fromJson(response_ as core.Map<core.String, core.dynamic>);
}