def METHOD_NAME(api_volume) -> client.V1PersistentVolumeClaim:
    """
    Return a V1PersistentVolumeClaim dict object from the request's JSON
    API Volume.
    api_volume: The JSON V1Volume object, in cammelCase as defined in the docs
    """
    check_volume_format(api_volume)
    if NEW_PVC not in api_volume:
        return None
    pvc = api.deserialize(api_volume[NEW_PVC], "V1PersistentVolumeClaim")
    # don't allow users to explicitly set the Namespace
    if pvc.metadata.namespace is not None:
        raise BadRequest("PVC should not specify the namespace.")
    return pvc