async def METHOD_NAME(
        blob_url,  # type: str
        output,  # type: str
        credential=None,  # type: Optional[Union[str, Dict[str, str], AzureNamedKeyCredential, AzureSasCredential, "TokenCredential"]] # pylint: disable=line-too-long
        **kwargs):
    # type: (...) -> None
    """Download the contents of a blob to a local file or stream.
    :param str blob_url:
        The full URI to the blob. This can also include a SAS token.
    :param output:
        Where the data should be downloaded to. This could be either a file path to write to,
        or an open IO handle to write to.
    :type output: str or writable stream
    :param credential:
        The credentials with which to authenticate. This is optional if the
        blob URL already has a SAS token or the blob is public. The value can be a SAS token string,
        an instance of a AzureSasCredential or AzureNamedKeyCredential from azure.core.credentials,
        an account shared access key, or an instance of a TokenCredentials class from azure.identity.
        If the resource URI already contains a SAS token, this will be ignored in favor of an explicit credential
        - except in the case of AzureSasCredential, where the conflicting SAS tokens will raise a ValueError.
        If using an instance of AzureNamedKeyCredential, "name" should be the storage account name, and "key"
        should be the storage account key.
    :keyword bool overwrite:
        Whether the local file should be overwritten if it already exists. The default value is
        `False` - in which case a ValueError will be raised if the file already exists. If set to
        `True`, an attempt will be made to write to the existing file. If a stream handle is passed
        in, this value is ignored.
    :keyword int max_concurrency:
        The number of parallel connections with which to download.
    :keyword int offset:
        Start of byte range to use for downloading a section of the blob.
        Must be set if length is provided.
    :keyword int length:
        Number of bytes to read from the stream. This is optional, but
        should be supplied for optimal performance.
    :keyword bool validate_content:
        If true, calculates an MD5 hash for each chunk of the blob. The storage
        service checks the hash of the content that has arrived with the hash
        that was sent. This is primarily valuable for detecting bitflips on
        the wire if using http instead of https as https (the default) will
        already validate. Note that this MD5 hash is not stored with the
        blob. Also note that if enabled, the memory-efficient upload algorithm
        will not be used, because computing the MD5 hash requires buffering
        entire blocks, and doing so defeats the purpose of the memory-efficient algorithm.
    :rtype: None
    """
    overwrite = kwargs.pop('overwrite', False)
    async with BlobClient.from_blob_url(blob_url, credential=credential) as client:
        if hasattr(output, 'write'):
            await _download_to_stream(client, output, **kwargs)
        else:
            if not overwrite and os.path.isfile(output):
                raise ValueError("The file '{}' already exists.".format(output))
            with open(output, 'wb') as file_handle:
                await _download_to_stream(client, file_handle, **kwargs)