<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_k8s_versions_completion_list(cmd, prefix, namespace, **kwargs):
 # pylint: disable=unused-argument """Return Kubernetes versions available for provisioning a new cluster."""

    location = _get_location(cmd.cli_ctx, namespace)
    return get_k8s_versions(cmd.cli_ctx, location) if location else None