code: boolean invoke() {
          if (complete) {
              return complete;
          }
  
          if (iterations >= results.length) {
              int newlen = expandTo(results.length);
              if (newlen < 0) {
                  complete = true;
                  return complete;
              }
              results = Arrays.copyOf(results, newlen);
          }
  
          long res = Math.max(task.time(), 1);
          results[iterations] = res;
          if (stable.length > 0) {
              stable[iterations % stable.length] = res;
              if (iterations > stable.length && inBounds(stable, stableLimit)) {
                  complete = true;
              }
          }
  
          remainingTime -= res;
          iterations++;
  
          if (iterations >= limit || remainingTime < 0) {
              complete = true;
          }
          return complete;
      }
docs: Perform a single additional iteration of the task.
  
  @return true if this task is now complete.