code: public function getCallCount($method)
      {
          $this->dieOnNoMethod($method, 'get call count');
          $method = strtolower($method);
          if (! isset($this->call_counts[$method])) {
              return 0;
          }
  
          return $this->call_counts[$method];
      }
docs: Fetches the call count of a method so far.
  
  @param string $method        Method name called.
  
  @return int              Number of calls so far.