code: async function findPr(branchName, prTitle, state = 'all', refreshCache) {
    logger.debug(`findPr(${branchName}, "${prTitle}", "${state}")`);
    const prList = await getPrList({ refreshCache });
    const pr = prList.find(isRelevantPr(branchName, prTitle, state));
    if (pr) {
      logger.debug(`Found PR #${pr.number}`);
    } else {
      logger.debug(`DID NOT Found PR from branch #${branchName}`);
    }
    return pr;
  }
docs: TODO: coverage istanbul ignore next