describeThemeAlias method
Describes the alias for a theme.
May throw ConflictException. May throw InvalidParameterValueException. May throw ResourceNotFoundException. May throw ThrottlingException. May throw UnsupportedUserEditionException. May throw InternalFailureException.
Parameter aliasName :
The name of the theme alias that you want to describe.
Parameter awsAccountId :
The ID of the AWS account that contains the theme alias that you're
describing.
Parameter themeId :
The ID for the theme.
Implementation
Future<DescribeThemeAliasResponse> describeThemeAlias({
  required String aliasName,
  required String awsAccountId,
  required String themeId,
}) async {
  ArgumentError.checkNotNull(aliasName, 'aliasName');
  _s.validateStringLength(
    'aliasName',
    aliasName,
    1,
    2048,
    isRequired: true,
  );
  ArgumentError.checkNotNull(awsAccountId, 'awsAccountId');
  _s.validateStringLength(
    'awsAccountId',
    awsAccountId,
    12,
    12,
    isRequired: true,
  );
  ArgumentError.checkNotNull(themeId, 'themeId');
  _s.validateStringLength(
    'themeId',
    themeId,
    1,
    2048,
    isRequired: true,
  );
  final response = await _protocol.send(
    payload: null,
    method: 'GET',
    requestUri:
        '/accounts/${Uri.encodeComponent(awsAccountId)}/themes/${Uri.encodeComponent(themeId)}/aliases/${Uri.encodeComponent(aliasName)}',
    exceptionFnMap: _exceptionFns,
  );
  return DescribeThemeAliasResponse.fromJson(response);
}