AzureDevOps Python REST API 中的这个神奇客户端字符串是什么？

Question

在用于 Azure DevOps 的 Python REST API ( https://github.com/Microsoft/azure-devops-python-api ) 中，仅给出了一个示例来解析项目列表：from vsts.vss_connection import VssConnectionfrom msrest.authentication import BasicAuthenticationimport pprint# Fill in with your personal access token and org URLpersonal_access_token = 'YOURPAT'organization_url = 'https://dev.azure.com/YOURORG'# Create a connection to the orgcredentials = BasicAuthentication('', personal_access_token)connection = VssConnection(base_url=organization_url, creds=credentials)# Get a client (the "core" client provides access to projects, teams, etc)core_client = connection.get_client('vsts.core.v4_0.core_client.CoreClient')这个字符串是'vsts.core.v4_0.core_client.CoreClient'从哪里来的？更重要的是，对应的“魔弦”是什么来操作：工作项测试运行和结果任务构建等等...