The TagResource api call method does not seem to be available.  Get a 404 (NOT FOUND) when calling this method.
if runtime.startswith(LAMBDA_RUNTIME_DOTNETCORE2) or runtime.startswith(LAMBDA_RUNTIME_DOTNETCORE21):
        return handler_name.split(':')[-1]
    else:
        return handler_name.split('.')[-1]
def error_response(msg, code=500, error_type='InternalFailure'):
    LOG.warning(msg)
    return aws_responses.flask_error_response(msg, code=code, error_type=error_type)
def get_zip_bytes(function_code):
    """Returns the ZIP file contents from a FunctionCode dict.
    :type function_code: dict
    :param function_code: https://docs.aws.amazon.com/lambda/latest/dg/API_FunctionCode.html
    :returns: bytes of the Zip file.
    """
    if 'S3Bucket' in function_code:
        s3_client = aws_stack.connect_to_service('s3')
        bytes_io = BytesIO()
        try:
            s3_client.download_fileobj(function_code['S3Bucket'], function_code['S3Key'], bytes_io)
            zip_file_content = bytes_io.getvalue()
        except Exception as e:
            return error_response('Unable to fetch Lambda archive from S3: %s' % e, 404)
    elif 'ZipFile' in function_code:
        zip_file_content = function_code['ZipFile']
        zip_file_content = base64.b64decode(zip_file_content)
    else:
        return error_response('No valid Lambda archive specified.', 400)
    return zip_file_content