How to use the smriprep.__about__.DOWNLOAD_URL function in smriprep

"""
    import os
    from pathlib import Path
    import json
    from ..__about__ import __version__, __url__, DOWNLOAD_URL

    bids_dir = Path(bids_dir)
    deriv_dir = Path(deriv_dir)
    desc = {
        'Name': 'sMRIPrep - Structural MRI PREProcessing workflow',
        'BIDSVersion': '1.1.1',
        'PipelineDescription': {
            'Name': 'sMRIPrep',
            'Version': __version__,
            'CodeURL': DOWNLOAD_URL,
        },
        'CodeURL': __url__,
        'HowToAcknowledge':
            'Please cite our paper (https://doi.org/10.1101/306951), and '
            'include the generated citation boilerplate within the Methods '
            'section of the text.',
    }

    # Keys that can only be set by environment
    if 'SMRIPREP_DOCKER_TAG' in os.environ:
        desc['DockerHubContainerTag'] = os.environ['SMRIPREP_DOCKER_TAG']
    if 'SMRIPREP_SINGULARITY_URL' in os.environ:
        singularity_url = os.environ['SMRIPREP_SINGULARITY_URL']
        desc['SingularityContainerURL'] = singularity_url

        singularity_md5 = _get_shub_version(singularity_url)