How to use the tsrc.Repo function in tsrc

def _handle_repo(self, repo_config: Any) -> None:
        src = repo_config["src"]
        branch = repo_config.get("branch", "master")
        tag = repo_config.get("tag")
        sha1 = repo_config.get("sha1")
        url = repo_config.get("url")
        if url:
            origin = tsrc.Remote(name="origin", url=url)
            remotes = [origin]
        else:
            remotes = self._handle_remotes(repo_config)
        repo = tsrc.Repo(src=src, branch=branch, sha1=sha1, tag=tag, remotes=remotes)
        self._repos.append(repo)

from path import Path
import cli_ui as ui

import tsrc
import tsrc.cli


class CommandFailed(tsrc.Error):
    pass


class CouldNotStartProcess(tsrc.Error):
    pass


class CmdRunner(tsrc.Task[tsrc.Repo]):
    def __init__(
        self, workspace_path: Path, cmd: List[str], cmd_as_str: str, shell: bool = False
    ) -> None:
        self.workspace_path = workspace_path
        self.cmd = cmd
        self.cmd_as_str = cmd_as_str
        self.shell = shell

    def display_item(self, repo: tsrc.Repo) -> str:
        return repo.src

    def on_start(self, *, num_items: int) -> None:
        ui.info_1("Running `%s` on %d repos" % (self.cmd_as_str, num_items))

    def on_failure(self, *, num_errors: int) -> None:
        ui.error("Command failed for %s repo(s)" % num_errors)

return res


def describe_dirty(git_status: tsrc.git.Status) -> List[ui.Token]:
    res = []  # type: List[ui.Token]
    if git_status.dirty:
        res += [ui.red, "(dirty)"]
    return res


def erase_last_line() -> None:
    terminal_size = shutil.get_terminal_size()
    ui.info(" " * terminal_size.columns, end="\r")


class StatusCollector(tsrc.Task[tsrc.Repo]):
    def __init__(self, workspace_path: Path) -> None:
        self.workspace_path = workspace_path
        self.statuses = collections.OrderedDict()  # type: CollectedStatuses
        self.num_repos = 0

    def display_item(self, repo: tsrc.Repo) -> str:
        return repo.src

    def process(self, index: int, total: int, repo: tsrc.Repo) -> None:
        ui.info_count(index, total, repo.src, end="\r")
        full_path = self.workspace_path / repo.src

        if not full_path.exists():
            self.statuses[repo.src] = tsrc.errors.MissingRepo(repo.src)
            return