createNumRequestCounter({ category, serviceFamily, name }) {
    const service = decamelize(name)
    return this.counters.numRequests.labels(category, serviceFamily, service)
  }
@param {object} attrs Refer to individual attrs
@param {string} attrs.category e.g: 'build'
@param {string} attrs.serviceFamily e.g: 'npm'
@param {string} attrs.name e.g: 'NpmVersion'
@returns {object} `{ inc() {} }`.