def METHOD_NAME(environ: Mapping) -> bool:
    """
    Use environ to determine whether it is running in Jenkins.
    According to the doc,
    https://www.jenkins.io/doc/book/pipeline/jenkinsfile/#working-with-your-jenkinsfile
    > BUILD_TAG
    >   String of jenkins-${JOB_NAME}-${BUILD_NUMBER}.
    > ...
    > JENKINS_URL
    >   Full URL of Jenkins, such as https://example.com:port/jenkins/
    >   (NOTE: only available if Jenkins URL set in "System Configuration")
    Here firstly check JENKINS_URL's presence, if not, then fallback to check BUILD_TAG starts with "jenkins"
    """
    return "JENKINS_URL" in environ or environ.get("BUILD_TAG", "").startswith("jenkins-")