code: function inward_act_cache(ctxt, data) {
    var so = ctxt.options
    var meta = data.meta
  
    var actid = meta.id
    var private$ = ctxt.seneca.private$
  
    if (actid != null && so.history.active) {
      var actdetails = private$.history.get(actid)
  
      if (actdetails) {
        private$.stats.act.cache++
  
        var latest = actdetails.result[actdetails.result.length - 1] || {}
  
        var out = {
          kind: latest.err ? 'error' : 'result',
          result: latest.res || null,
          error: latest.err || null,
          log: {
            level: 'debug',
            data: {
              kind: 'act',
              case: 'CACHE',
              cachetime: latest.when
            }
          }
        }
  
        ctxt.cached$ = true
  
        return out
      }
    }
  }
docs: Check if actid has already been seen, and if action cache is active, then provide cached result, if any. Return true in this case.