How to use the lastversion.GitLabRepoSession.GitLabRepoSession function in lastversion

import logging as log  # for verbose output
from .BitBucketRepoSession import BitBucketRepoSession
from .GitHubRepoSession import GitHubRepoSession
from .GitLabRepoSession import GitLabRepoSession
from .LocalVersionSession import LocalVersionSession
from .MercurialRepoSession import MercurialRepoSession
from .SourceForgeRepoSession import SourceForgeRepoSession


class HolderFactory:
    HOLDERS = {
        'github': GitHubRepoSession,
        'gitlab': GitLabRepoSession,
        'bitbucket': BitBucketRepoSession,
        'hg': MercurialRepoSession,
        'sf': SourceForgeRepoSession,
        'local': LocalVersionSession
    }

    @staticmethod
    # go through subclasses in order to find the one that is hodling a given project
    # repo is either complete URL or a name allowing to identify a single project
    def get_instance_for_repo(repo):
        holder_class = HolderFactory.HOLDERS['github']
        hostname = None
        known_repo = None
        for k, sc in HolderFactory.HOLDERS.items():
            known_repo = sc.is_official_for_repo(repo)
            if known_repo:

def __init__(self, repo, hostname):
        super(GitLabRepoSession, self).__init__()
        self.pa_token = os.getenv("GITLAB_PA_TOKEN")
        self.hostname = hostname
        if not self.hostname:
            self.hostname = self.DEFAULT_HOSTNAME
        if self.pa_token:
            log.info('Using Personal Access token.')
            self.headers.update({'Private-Token': "{}".format(self.pa_token)})
        self.api_base = 'https://{}/api/v4'.format(self.hostname)
        self.repo = repo
        self.repo_id = self.repo.replace('/', '%2F')